Surfing Waves

Hi there, and thanks in advance for your advice;)
I just relocated in Porto, Portugal, and I eventually have almost daily conditions to surf.
When I lived in Italy I was forced to fly to Basque Country or Canary Islands to practice.
Actually is almost ten years I haven't been surfing.
I'm 42, 5'11'', 175lbs nice physical fit and I would define myself almost an intermediate surfer (or at least as such 10 years ago).
I'm about to buy a new board and I was considering something between 5'11 and 6'6 depending on the board, namely (beside local shapers nice opportunities) I shortlisted my choice to:
Firewire Evo Helium 5'11, Haydens Hypto Krypto 6'2, Takayama Scorpio 2 6'4, Pyzel Phanthom 6'2/Gremlin 6'0
Despite I should have nice consistent waves, I'm worried to have to few liters under my chest given the time I haven't been surfing.
Let my know your thoughts
Ciao,
Paolo

I think you’ll have a very hard time with a shortboard. But it probably depends on how young you were when you achieved intermediate skills. I had intermediate surf skills and quit for 12 years. It was just like learning all over again to me. But I have heard that if you are very young when you learn then it’s like riding a bike The advantage you will have is knowing what to do

I've never surfed at Porto and whenever my surfer friends send me videos of their "good" surf. They don't look that great, I don't think it will work with a shortboard?

Try rent one. After 1.5 year of very little surf, my stamina and confidence is gone. I can't even surf two days in a row now.