First off, Welcome :beer:
That's a really nice boat. Congrats on the purchase.
Regarding deck size, its really a personal preference thing. If your boat is exactly like the picture, I think you have the absolute perfect set-up. The deck is plenty big enough to walk around on, mount a pedestal seat, work a foot-controlled trolling motor .... but its small enough to leave a nice sized floor area.
It also looks like there is an access portal allowing you to stuff things up under the deck .... seems like plenty of access to me.
If you wanted to extend the deck though, and maybe put flip-up hatches to access the storage space, check out the builds section of this site for lots and lots of ideas.