I would suggest doing some reading on how to find fulfillment in an otherwise "absurd" world. I found "The Myth of Sisyphus" by Albert Camus and "Man's Search for Meaning" by Viktor Frankl to be very helpful.
Ultimately, life's journey is your own. I would only caution against judging other's too harshly while they try to find their own way. With a little effort, you can choose to celebrate the ways people are different from you as much as you appreciate your similarities.
First off, I'm sorry for your loss. I have a close family friend that is experiencing something similar. I cannot even imagine what it must be like spending 10, 20 or 30 plus years with your best friend, and then they're gone. Must be really tough. Someone else mentioned to check out hobby groups in the area your mom lives in, and I think that's a great idea. Whenever I would move to a new area, I would make friends through events on meetup.com. Perhaps there's something that could suit her, book club or knitting. IDK, something appropriate for a 70 year old. The main thing I wanted to recommend though, was that she should try to travel on her own.
You mentioned she mostly travels with cruises or on resorts though, and I know those tend to be less solo travel friendly. A quick search for "old people travel cruises" (I know realize the correct term would have been Senior) came up with several options which might be to her liking. I would see if she's open to solo traveling, and then encouraging her to do it. If you go to r/solotravel you'll see it's not just gap year kids solo traveling.
Lastly, and I kinda feel bad even mentioning it, is maybe a retirement home/community would be a good idea. I know most people associate those homes for elderly who can no longer physically take care of themselves, but there must be people who choose to go there for the social aspect. Your mom is well within the age for a place like that. Hope any of this helps. You're a good son/daughter for caring.
I'm getting ready to write a test too, this shit is amazing when you need to focus on something you really don't want to.
Also if you get tired of letting this, pop this badboy on:
http://www.infinitelooper.com/?v=aujuq1NQI9g&p=n
You can add rainymood to pretty much anything if you haven't used that before.
Hi alexalexalex, I am sorry to hear you are going through this. It sounds really challenging and like there are years of ongoing pain and dysfunction in the relationship with your mom and also step dad. It is valid that you feel this way. I strongly recommend reading the book called Toxic Parents (Toxic Parents: Overcoming Their Hurtful Legacy and Reclaiming Your Life https://www.amazon.ca/dp/0553381407/ref=cm_sw_r_awdo_navT_g_R0DG7BF4GZZ9V48CXV7N). This book helped me to feel validated in struggles I experienced, and in the second half of the book, it also offers clarity in how you can move forward and regain some of your power and remove yourself emotionally (and reduce your resentment).
If you are unable to do much physical work due to your disability, you can try looking into work you can do from home online. You said you worked for a telecom, I believe there are lots of companies that hire people to work exclusively from home doing things like basic tech support, customer service, etc. You can also look into doing online content writing. Your English is pretty good, and sites like upwork.com are useful resources for finding freelance writing work that can help you earn extra money and you can work around your own schedule. And it may not be something you're interested in, but you could also look into freelance tutoring online to earn some money as well. I don't know how helpful any of this is to you because I don't know what other restrictions you face living in HK, but looking for work you can do from home on the computer would be your best bet if your physical disability makes it hard for you to leave home.
Would you like it on a more personal scale or bigger? I also look to r/selfimprovement sometimes, but for more dedicated support (to writing) I'm in some Discord servers.
Another thing I like to use is https://habitica.com/ It helps gamify tasks and helps me to get anything done.
This book is great. Really simple and it explains exactly what meditation can do for you. I know it seems strange but it really can work wonders if you give it a serious chance. If you can commit to 5 minutes a day for a month, I believe you'll feel happier.