Parking my car on the street

I don't have a garage so my car is out in the weather all the time. Also I don't know how to change the oil or if I need to do it now. Please advise.

I always park my car in a parking lot too. Not a big deal. But get an oil change every 3,000 miles or so. Just pay a mechanic to do it. When they change your oil, they will sometimes do other things too, like look and see if there are other problems, or sometimes put air in the tires. Just make sure you go to a trustworthy mechanic, because other places will make up fake "repairs" that need to be done and then charge you extra.