I read a book on potty training by a lady who is a professional nanny. She said potty chairs and pull ups are a big NO. 1. Pull ups mimic diapers and confuse the child. Just use underwear. 2. Potty chairs will not help a child get used to the big scary toilet that flushes loud. Especially when you are out in town and have to use a public restroom. It's best that they learn on the real toilet.

Try putting a wee wee pad or something similar inside so you can just grab it and dump it all

I never used a potty chair, I used the potty seat that goes on the regular toilet seat, A lot better in my experience.

There's plenty of good seat reducer options for beginners as well as those doing it themselves so I think it won't be an issue.

He started resisting the toilet so we just let him use what ever, then he was really stubborn about pooping in either so we went with whatever we could get. Now I'm just so over it because my husband never cleans it out when he deals with poop even though I tell him every time it happens. I don't even want that to be a possibility next time.