Yes, I have a few suggestions. If you want to make memes to gain post karma download this free meme generator app. It will give you blank templates with suggestive content you can use to make OC memes.
I recommend you check out ZomboDroid’s Meme Generator https://play.google.com/store/apps/details?id=com.zombodroid.MemeGenerator
Also, you can gain comment karma in subs by sorting through rising and make funny comments on posts that will be in hot soon.