> How to find friends and girls? Where?

Anywhere you share something in common, university, school, library, computer store, hobby shop, dog walking park, hiking trail, net cafe, conference, work
> How to initiate conversation with people or girls in different situations? 

< Hello my name is Nanon, I'm new around here and trying to meet people. How long have you been attending current event

> How to talk to a stranger?

< Hi, I'm Nanon nice to meet you. [the thing you wanted to say]

> What places can you go outside home? What can you do there?

The ocean, lake or a river:
Fishing, swimming, kayaking, enjoying the nature
A park:
Walk around, enjoy grass on your feet, watch animals do cute things
City:
Spend money like a consumerist retard, get homeless people begging you for money, people being rude to you because it's a globalist hellhole and everyone hates eachother, but at least you can find international restaurants, personally I like to eat sashimi
Net cafe:
Play gaemz with poorfags, get a headache from bad smell, buy weed
Hackerspace, or something similar like a conference:
Make friends, work on projects with people, meet people that aren't completely retarded for a change
Hiking trail:
Go hiking or mountain biking, don't really interact with people but its comfy anyway
etc etc etc etc
> How to sex people?

Lower standards, have secks with some sluts and then realize you weren't missing out on much. Continue to wait until you find a real girlfriend who is wife material.
> What activities can be performed by humans? In what places? How to go there and do them?

Whatever you want, just join a club and go do it