What surfboard should I buy. Tall guy

I recently went to surf camp for a week and want to buy a board.
I'm in the beginner to intermediate stage. I can spot waves and get up on my own power. Success is at about 50% of catching vs. not catching the wave. Not turning or anything yet. Just catching it, straight on or going at an angle.
I rode 10 foot and a 9 foot Walden Long board. I liked them both and would prefer to get a long board.
However, I live in New York and don't have a car. So I'll have to take public transportation/ mass transit / commuter rail to Long Beach New York and would like to get a smaller sized board for transporting.
(I'll rent a long board for a few weeks, but eventually I'll want to buy my own.)
Any recommendations for smaller sized boards with good volume?
Also, what size volume do you recommend?
I liked the stability of the long board. Both were 3 inches or more.
I've read so much and it's a bit overwhelming. I know some boards or shapers actually put the thickness, or the foam in the front portion of the board for bigger guys to help with floatation and to help beginners catch wave. But I cant tell which one's they are?
Stats
Male
40 years old
Fit and Athletic
Height 6'4 / 193 CM
Weight 190 Pounds / 86 kg
Some I found are the
Walden 7'6 MEGA MINI MAGIC SLX
https://www.waldensurfboards.com/collec ... -magic-slx
6'10 MEGA MINI MAGIC SLX
https://www.waldensurfboards.com/collec ... -magic-slx
Rusty Zepplin
http://www.rustysurfboards.com/zeppelin/
Channel Island M 13
http://www.cisurfboards.com/surfboards/ ... p/the-m13/
I'm in the beginner to intermediate stage. I can spot waves and get up on my own power. Success is at about 50% of catching vs. not catching the wave. Not turning or anything yet. Just catching it, straight on or going at an angle.
I rode 10 foot and a 9 foot Walden Long board. I liked them both and would prefer to get a long board.
However, I live in New York and don't have a car. So I'll have to take public transportation/ mass transit / commuter rail to Long Beach New York and would like to get a smaller sized board for transporting.
(I'll rent a long board for a few weeks, but eventually I'll want to buy my own.)
Any recommendations for smaller sized boards with good volume?
Also, what size volume do you recommend?
I liked the stability of the long board. Both were 3 inches or more.
I've read so much and it's a bit overwhelming. I know some boards or shapers actually put the thickness, or the foam in the front portion of the board for bigger guys to help with floatation and to help beginners catch wave. But I cant tell which one's they are?
Stats
Male
40 years old
Fit and Athletic
Height 6'4 / 193 CM
Weight 190 Pounds / 86 kg
Some I found are the
Walden 7'6 MEGA MINI MAGIC SLX
https://www.waldensurfboards.com/collec ... -magic-slx
6'10 MEGA MINI MAGIC SLX
https://www.waldensurfboards.com/collec ... -magic-slx
Rusty Zepplin
http://www.rustysurfboards.com/zeppelin/
Channel Island M 13
http://www.cisurfboards.com/surfboards/ ... p/the-m13/