Lube properly, shoot..... shoot some more...... then clean.
Always clean out the barrel of a new gun, any gun. You have no idea what was the last bit of grit your gun was around before you picked it up.
Does not need a full DCOR just clean out the barrle, lube and break it in.
If you get a ftf on a full mag then drop a round and keep going. It may just be a tight spring in the mag--no big deal.
stovepipe on first mag--keep going and break in the extractor before you tear it all down looking for problems.