Sure thing, you will have to contact a participating Red/blue squad to fly along ( like ATAG, The Syndicate, 501 squadron ect ) for the Reddies, they take public players.
Otherwise you will have no briefing and we like to have organised flights and fights
We at 5./JG27 also take on public players. Numbers don't seem to be too big of a problem, blue is a little short on pilots but the choice is up to you.