Scratching an old itch

[Morrisboy]

I'm an old fahrt looking to scratch a long standing itch, namely bikes.
Some background. I'm 63 , mostly healthy but with a chocolate back. I rode a bike way back when a 250 was ok for a learner, did my cbt when it came in and then gave up.
Yesterday as a start to removing the itch I did my cbt with CAM rider at Kettering. I throughly enjoyed it but have a few nagging doubts. Which is where you gentlemen may be able to help.
I struggled with the low speed riding, being somewhat inconsistent. Is it all down to practice or is there a need for some inbuilt ability?
Also at the end of the day I felt exhausted, my arms were useless! I know I was badly tensed up at the start but relaxed as the day went on. I suspect it was down to technique, any words of wisdom?
As for my chocolate back, I couldn't get a 125 on the centre stand🙁
So, DAS or not?

[Morrisboy]

R1dave-yes the cones stuff. As I got more tired through the day I got more and more ragged.
Trickywoo-thanks for the advice. Guess I just need to find some confidence.

[Morrisboy]

I'm ok on a bicycle! I guess I need practice.
The instructor said 4 or 5 sessions would see me through mod1 and mod2 so I must have showed some aptitude!
"Grip of death" lol. That sums it up.

[Morrisboy]

Thanks for the advice and encouragement.