Things to do in San Jose and surroundings? (San José)

Hello San Jose Community!

I will be visiting San Jose for March10th -15th. It´s my first time in Costa Rica and in order to have may replies to this post since now I want to ask to any of you what would you recommend me to do during these 5 days? Do you know about trust websites to check out? I will appreciate any advice!!
And if someone can join me for a coffe and show me nice places you´re more than welcome!
Cheers!
Melania.