is it normal to have moved on in a month?

I (18f) broke up with my first boyfriend just over a month ago - we dated for 3 months. I really don't want to date again for a while, but I started flirting with a boy in one of my classes and I think we're going to hook up at some point. my ex boyfriend was literally my first everything and was quite "unconventional" in some of the stuff he liked, so I think I just want to get more experience and understand more about what the norm is (on top of just wanting to have fun tbh), but I feel very guilty for talking to other people. I broke up with him so he's more upset than I am - I do not want to get back with him, and I still think about him a lot so I'm not over him completely by any means, but I'm worried that a month is way to soon and I feel like a really bad person as I've really upset him - (he doesn't know I've talked to anyone else and I want to keep it that way, but I still feel sort of evil for moving on).

I (18f) broke up with my first boyfriend just over a month ago - we dated for 3 months. I really don't want to date again for a while, but I started flirting with a boy in one of my classes and I think we're going to hook up at some point. my ex boyfriend was literally my first everything and was quite "unconventional" in some of the stuff he liked, so I think I just want to get more experience and understand more about what the norm is (on top of just wanting to have fun tbh), but I feel very guilty for talking to other people. I broke up with him so he's more upset than I am - I do not want to get back with him, and I still think about him a lot so I'm not over him completely by any means, but I'm worried that a month is way to soon and I feel like a really bad person as I've really upset him - (he doesn't know I've talked to anyone else and I want to keep it that way, but I still feel sort of evil for moving on).