I don’t have a Mac or pc, can I connect my iPhone to my iPad to reset it?

Sorry no.

If you want to restore it to factory settings you need a computer, as per these instructions:--> Restore your iPhone, iPad, or iPod to factory settings – Apple Support.

or, if you want to start from scratch, you can perform this procedure:--> What to do before you sell, give away, or trade in your Mac - Apple Support

Regards

Giulio

If you forgot your passcode and your phone is disabled, you need to use a Mac or PC to restore it. Borrow one from a friend or family member or get help at an Apple Store.

no you cannot do it from an iPad