hiii I have a question

Click on your album
click on the picture you want
under the picture there'll be an edit button
on the edit popup, there's an option to select the picture as a cover
click "yes" and submit

or click on your album
click batch edit
tap or hover over the top part of the picture you want to use as the cover
there'll be a button that says "set cover" select that and save

thank you so much I’ll try this!!