Travelling to Costa Rica in April need help

Hi guys , travelling to Costa Rica with my partner in April . We arrive in San Jose 3pm and we have booked an Airbnb in puerto viejo . How the hell are we going to get there at that time ???? Do you guys recommend gettransfer.com?? Found a deal between £215 (mini bus might say no as it’s just two of us ) or £279 with return back to the airport when we leave . Also I have no idea what we are going to do in puerto viejo, any ideas and recommendations, we don’t want to go crazy on spending , we aren’t renting a car either . We love the beach , animals etc and food . Will it be easy to travel within the area etc ?? Also we are going April 7th -23 please tell me the weather will be nice . I’m worried guys !!