Well I haven't surfed for around 16-17 years (39 today) and have been working in Cornwall and have the bug again

I surfed for around 5 years before and although I thought I was the business at time I was far from it. I could ride my 6 foot board though and could ride a wave out a good amount of time.
I was 10.5 stone at time and now 17 stone following a lot of weight lifting and if I'm honest a lot of cakes also.
So I am assuming that foaming I will outgrow quite quick and pop out long enough to float me will weigh a tonne!
I was considering a decent mini mal around 7' 8" but would love to know your thoughts on this?
I'm assuming I would want something with fairly soft rails to begin and with good flotation for my weight.
Any tips for an old, fat, start again weekend warrior would be much appreciated
Cheers
Colin