LOL..... that was an experience
With the aim of not "overhorsing myself" I went to a dealers that specialises in ponies

I knew beforehand that she had a couple of 14.2hh geldings, and it wasn't too far away, so I decided a trip out was a good idea.
Unfortunately all of them were 4/5 year olds, but I decided to have a look at the eldest - a 5 year old grey connemara probably pushing 15hh.
The YO rode him first, and he had a nice stride and looked happy and balanced. I don't jump, but she popped him over a jump and it was nice to see that he remained sensible (although obviously had a MASSIVE jump inside him waiting for the right person to come along!

).
So I said yep, I'd like to ride him, because he was along the lines of what I am looking for......
Well! ...lol... That was a learning point!
He was forward going, which doesn't worry me, although I felt like we were fair whizzing along!

.....it was more that I couldn't put him where I wanted!

.... or slow him down without a pull on the mouth

I had him cantering at one point, and couldn't keep him out on the track and thought we were going to go over the jump!

(he was game, if I wanted to!) ......and to finish me off, when I went to dismount he kept moving off, so I nearly fell off.
I couldn't make my mind up whether I am actually an appalling rider, or he was simply not very schooled. So when I had my lesson the next day I asked to work on inside leg to outside hand

It worked, so I can only conclude that 5 yr olds are too young for me ..... lol
It's a good learning process though. I think I'm going to need a strict 8 yr old age limit, and preferably horses with some dressage experience.