Welcome to the forum, and congrats on returning to riding!
You never really forget how to ride it seems to be getting in shape again that most people struggle with. lol. I never stopped riding but I'm coming off a 2 year break of not being really competitive, and I was sure surprised at my lack of stamina when I returned to 6 days a week of riding. I was 4 when I first started riding... But before I got my first horse(age 10) I wish someone had told me that your trainer shouldn't make you feel like a total idiot. Got stuck in a bad situation for awhile because I didn't realize anything was wrong.
Good luck and keep us posted on how your lessons go!
<3 Dallas, Dakota, and Shaymus <3
RIP Shaymus 8/16/13