Don't worry, this is an extremely common problem for most skaters. The problem is that you're comfortable on your inside edges, but not your outside edges, and to become a really good skater you have to be comfortable on all 4 edges. You're gonna have to do a bunch of edgework drills to improve on this. This video has some GREAT edgework drills:
My suggested progression through the drills would be:
1) Start with the figure 8s, focusing on really improving on your outside edge figure 8s. Backwards and forwards is good, but if you can only do forwards that's fine for now, you can work on your backward skating later
2) They show "1 leg weaving" next, but I'd actually have this as the last step of your progression, it's quite difficult. Once you have the figure 8s nailed on both inside and outside edges I'd suggest progressing to scissor skating, it's easier and the more natural next step. Again, forwards and backwards if possible, start with the wide/slow/exaggerated scissor skating and progress to the narrow/quick scissor skating
3) Once you've nailed scissor skating you should be decently proficient on your outside edges, and thus ready to learn tight turns, where both feet are really engaged. This is a pretty good video for tight turns:
The key is to lead with your inside foot, get the pressure slightly (but only slightly) towards the heel on your leading/inside foot, and make sure you really sink your weight into the turn, and get a lot of weight into that leading/inside foot. Play around with different ankle angles on that leading/inside foot until you get the angle just right. Eventually these tight, 2-footed turns will start to feel completely natural. Ultimately your weight should be pretty evenly distributed between both feet, but at first you're gonna be hesitant to put enough weight on your inside foot, so I'd suggest going overkill at first (putting as much weight as possible on your inside foot), then eventually backing off to a roughly 50/50 weight distribution as you improve
4) Once you've nailed tight turns, start linking them together slalom-style as shown in the last 2 drills of the first video. This will help you learn to generate power through the turn
5) Keep practicing tight turns, but with a puck. You'll probably have difficulty performing tight turns where you're carrying the puck on your backhand at first, but that'll come with time/practice too
6) Finally, try the 1 foot skating drill from the first video, it's quite tough but once you've mastered that, you've pretty much mastered your edges
Follow this progression and you'll become a much better skater. Don't expect it to happen over night, but with enough practice you'll be turning like a pro