I hope you are doing fine :)
There is different ways to donate your time, from showing around Berlin to spending some of your time or working in local initiatives for refugees.
Find below two useful websites “Give Something Back To Berlin” and “Vostel”. These two initiatives help connecting volunteers with social organizations:
According to one of your message, you live in Friedenau, don’t you? Here under are two local communities located in your neighbourhood, that you could contact to offer your time :
Do not hesitate to let us know if you need any further help!