Welcome! First of all, since it seems that you don't have much experience with earbuds, I think I should point out to you that earbuds normally have a series of issues which IEMs normally don't: mainly lack of isolation and lack of sub bass (and more generally attenuated bass). That means that using earbuds in an even slightly noisy environment is not recommended.
If you're fine with that, let's move on to earbuds recommendation: you can find a nice recap of well-regarded earbuds in this post, courtesy of
@Marcos Fontana:
https://www.head-fi.org/threads/earbuds-round-up.441400/page-2540#post-14638000
If you can expand a bit more on your sound preferences, we can give you an additional hand sorting out those from the list that might not be appropriate. Keep in mind that a lot of the more expensive ones are in the 100+ ohms, which means you will need a good source powering them. If you're planning to use a cellphone, you should look at 32-64ohm max.