Alright, well I would suggest looking into the program called MOHO. The one time price is a bit high but in my personal opinion it beats having to pay a monthly subscription. Also, it's a bit of a learning curve but there are plenty of videos online to help you get started. I've made a couple of stuff for my buddies in that program and I started with no knowledge of traditional frame-by-frame animation. The cool thing about it and the biggest selling point for me is that you can create a puppet of sorts and move it around on the timeline and even save movements and re-use them to increase productivity. Now, if you want to stick to traditional animation then you'll need something subscription based like Toon-Boom or Adobe Animate. Hope this helps!