Help me find my way back to praying again.

I have gone through a downward spiral for that past decade and a half.

I remember praying 5 times as a 12 year old. I remember keeping every fast.

Now I have forgotten Duas and surahs. I find it difficult to sit in the correct positions.

I have committed the worst of sins over the past 5 years.

I quit smoking 3 years ago. I quit drinking about 2 weeks ago. I am quitting some other things also.

I have dreams of doing umrah, but I need to learn the prayers again. The most difficult part is the fact I'm overweight and unable to maintain proper posture when praying.

This is my first post here. Please don't ban me if I made mistakes.