Help a nail newb out please

Li

I was in a wedding this past Saturday and I got a gel manicure with 2 fake tips (un ever with rest ha).. I truly love them but sadly wont be able to go to a salon to keep them up.

1. How long will they last?

2. How do you remove them?

3. Are the gel polishes in store similar? I love how they are stronger and could do that at home.

Thank yyoouuuu.

I'm hoping yo find a way to keep them this strong and covered because I have psoriasis that makes them super brittle/pitted/ridged and peel away from nail bed/finger.. it's been SO NICE to not be embarrassed by my nails!