Start with a little bit of research, look at https://pro.iconosquare.com/ for stats and trending hashtags around your subject. For example, we are reviewing craft beer so I checked tags around #craftbeer. There was a lot of traffic around #craftbeer, #craftbeergeek, #drinkcraftnotcrap. So I'm always using these in my post to categorize them. Using #youtube and #subscribe bring people who are also interested in that.
Taking good pictures that are interesting to watch is always a good way to reach more people. (That's the way Instagram algorithm works.)
Then, with your research you can look at similar users who share the same passion and follow them. You will start getting suggestions from Instagram on whom to follow and don't be shy to get up to 500 accounts that you follow. It helps to create a nice feed from where you can interact with people in the comments.
And as always, being consistent is the key. Posting every day and going through pictures of your feed by liking pictures and comments will help a lot to get noticed.
PS: Make sure that you have a link to your YouTube channel in your account description because links don't work in your pictures descriptions.
Hope it helps, if you want more tips don't hesitate to ask! You can also check out our Instagram account: https://www.instagram.com/hopsandbros/
Iconosquare is great for Instagram (although that's about the only platform it's good for) and if budget isn't an issue, Sprinklr is the creme de la creme of social analytics platforms
Converting the account to a Business Profile is the best way to get stats going forward, however it will only start tracking it from the day you switch, you won't have access to any analytics prior to that.
Before Business Profiles came along i was using Iconosquare: https://pro.iconosquare.com/ and I found the info to be very useful. They give full overviews on likes/followers lost/followers gained/most engaged followers, etc. They have free trials so you don't have to commit to it - but worth checking it out.
I've used Iconosquare in the past. It's fairly good. There's a free trial for it and then you pay a fee. It tracks followers/following, hashtag details, post engagement, things like that.
Videos have a very good analytical model because it shows how many views they get. That was a great add, believe it happened earlier this year. It's a little tougher to gauge impressions previously for photos through the standard app.