Stay at Sportsmen's, meet other guys, get advice and recommendations, or Castillo (get the all inclusive small upcharge for food and drinks) or Taormina, where the hoz are.
Visit Monica's and Oasis.
Go to Taormina after 8 pm.
Generic Viagra at all pharmacies cheap and no prescription needed.
Consider Tinder or Skokka or Wilas (dot com on these, CRT dissolves them if printed out correctly...
If you want to fish, I guess Jaco is the place to go, then you can check out that scene and pay $150 to $200 for the same girls you will see in San Jose after the weekend for $80 to $100.
Jaco beach is a rat infested garbage dump sh*t hole in hell, For beaches consider Manuel Antonio on the Pacific side or Puerto Viejo on the eastern Caribbean side, lots of ganja over there, be leery at night both places, moreso PV...
Don't talk to strangers, keep your wallets in your front packets, don't get sh*t faced drunk in public or with a ho, keep your money and valuables in a safe or locked with real lock suitcase, always take Uber and taxi's at night, even short distances, and when you get back home, don't think you fell in love and start sending money to a ho...
That's all I got...