I like you started running later in life. I believe the best way to start is to put on your running shoes and walk out the front door. I like to tell people to have a clear route mapped out before going out. Say you are going to start with a mile, well know where the mile is and run to it and then maybe walk back. Try that until running that mile becomes easier and when that happens instead of walking back run back and now you know you can do 2 miles.
The key is don’t get discouraged or quit just keep at it, you will have good days and bad days but believe in yourself and you can do it.