Should I graduate to new board?

Friends,
I am looking for some advice here. I am 54 yo, 5'10" and 197lbs (~20% body fat). After a lot of struggles (my enthusiasm and diligence far exceeds my athletic ability) I feel that I have now mastered popping up and riding on the mush on my 8ft (22.5"x3.25") and 9 ft (24”x3.5”) foam surfboards. I am now attempting to paddle out back to start working on green waves. Having a lot of difficulty doing so. The 8 ft feels too unstable (I'd like more width) and the 9ft feels too buoyant and floaty and I spend all my energy on manhandling the board.
Would it be a good idea to now get a 9ft Malibu longboard or should I just stay the course? In my mind I feel like I would be better off with a 8' or 8'6" that is a bit wider than my 8' foam board since I have very broad shoulders.
Thank you for the feedback, friends!
P.S. I am also spending more time swimming now to increase my paddling strength.
I am looking for some advice here. I am 54 yo, 5'10" and 197lbs (~20% body fat). After a lot of struggles (my enthusiasm and diligence far exceeds my athletic ability) I feel that I have now mastered popping up and riding on the mush on my 8ft (22.5"x3.25") and 9 ft (24”x3.5”) foam surfboards. I am now attempting to paddle out back to start working on green waves. Having a lot of difficulty doing so. The 8 ft feels too unstable (I'd like more width) and the 9ft feels too buoyant and floaty and I spend all my energy on manhandling the board.
Would it be a good idea to now get a 9ft Malibu longboard or should I just stay the course? In my mind I feel like I would be better off with a 8' or 8'6" that is a bit wider than my 8' foam board since I have very broad shoulders.
Thank you for the feedback, friends!

P.S. I am also spending more time swimming now to increase my paddling strength.