Here s the op for a stock reply....
ok Welcome to the forum first off! ;p
Secondly, what are your stats etc... cause with out them there is no point in even suggesting anything,
Thirdly, at the end of the day its down to you and how you feel your surfing is progressing. Have a search in the forum (using the search function -->
https://surfing-waves.com/forum/search.php ) and you'll find alot of similar threads.
Moving from the fun board sizes (round the 7'2" mark etc with wider rails etc) to somthing shorter, thiner etc is a big jump but from the sounds of it you've taken a taste on a shorter board and feel comfortable....