Potty training help plz x

My daughter has recently turned 2 im a first time mum and struggling with what to do with potty training If her nappy is not on she knows to go on the potty but I can’t leave her all day walking around with nothing on bottom half But with clothes on she’ll just wet through and doesn’t understand the concept of pulling down and going potty so im stuck on how to go about it all ? Any advice would be appreciated 🩷