DS is beginning to TT himself (first wee on the toilet yesterday!)

I have a feeling my son will be the way he is with everything else - won't use a baby thing and will insist on the real deal (i.e. no highchair, only sits at booster seat at table etc).

I saw these things which was like a step up to the real toilet, and it also had a seat part on it so they don't fall in (hope i explained that well enough). Has anyone had one?

I just feel like he won't use an actual potty, he wants to use our toilet, and it's too high to get him just one of those smaller sized seats cos he can't get up by himself.

Anyone had the same problem?