Bike tips. I’m new to this.?

Maybe you come from a country where the word "threw" has a different meaning. Here in the USA, "threw" is the past tense of THROW. You want to throw your bike past a doorway? Or push your bike THROUGH a doorway? 🤔 I have to go up or down a few steps to get my bike in or out of the basement area in the apartment. Don't get in a rush. One hand on the handlebar. The other on the saddle (seat) or seat-post.

The #1 thing to remember on a bicycle is that it's a legally defined VEHICLE. You have the same right to be on streets as any car, truck, bus or motorcycle. In a narrow lane situation (at or less than 14 feet wide) you have the right to use the FULL LANE. Always ride at least 5' away from the curb. A) You avoid road debris which can cause a flat tire. B) It gets you SEEN by motorists. C) Most times it will prevent the dread "right hook" where a motorist passes you & then immediately makes a sharp right turn DEAD in front of you. Always go around parked cars leaving a 5' space also. Not every one looks before opening a car door. Start by reading this... http://www.bikexprt.com/streetsmarts/usa/

Videos? Two of them. 1) Cyclist's Eye View [part 1] - this is a 3 part series. Look for parts 2 & 3 on YouTube. https://www.youtube.com/watch?v=ZFjCza5e1kw

2) The Rights and Duties of Cyclists - https://www.youtube.com/watch?v=rU4nKKq02BU

Door to what? As for advice wear a helmet, get helmet mirrors, use hand signals and obey all traffic laws.