Can someone help me how to get a icoon in a fan club?

unless u created the club u cant change the icoon on your own. make a pick on the spot asking other fans for their opinion and to give them a chance to bevestig new ideas as well. once the fans have chosen u can message papa of dave and they will change it
for meer info (and i do encourage u to read it cause this is just the basics that i put down here) read this article:
link u will find your vraag answered at number 17!

and u should read the whole thing cause dammit its pretty good!