well um idk... sry. i dont do crushes but i hang out with boys a lot so i'd say try to find something that you like and then your crush also likes (among us, minecraft, reading, writing, drawing, sports, etc) and ask if he wants to do that with you
My school has personal email accounts that we use for google classroom, google drive, ect and we can do gmail with that too, if you have that, shoot them an email conversation and then work your way up from there. I haven't asked anyone out this way but I have made a few good friends.
Hope this helps, lol.
-Roasted_MemeScheme