Try to follow it step by step … and tell us where you get stuck.
It is a matter of facts that OSM is not a project where you can enter at all possibilities in one or two days. So I can only recommend to read the OSM wiki intensively, and also have a look in your area how other mappers have added and tagges objects there.
When you are familiar with the basics, success will follow soon !!!
The answer to such a generic question can only be, as stephen75 has pointed out, RTFM (Read The Friendly Manual). And yes, the learning curve is initially steep, and the manual may seem less friendly than you might want.
OTOH, if you ask a more specific question, you may well get a solution to the immediate problem at hand. If I understand correctly, you have been able to upload a trace. What exactly is your current problem?
And welcome to our community. More mappers are always welcome!