LOL! I wouldn't worry, you'll be ok if you ever decide to. Just go with someone who's Catholic and he or she will tell you what to do. Otherwise:
1) sit/stand all the way in the back
2) just follow everyone else with the standing and kneeling
3) no need to make responses, sing, or anything...plenty of other people won't be anyway.
4) when people go up for Communion just stay in your seat and let everybody go around you. Not everyone goes to Communion anyway, so no one will think it odd.
You can pretty much not participate and no one will say anything. :)
Thank you.
) when people go up for Communion just stay in your seat and let everybody go around you. Not everyone goes to Communion anyway, so no one will think it odd...
...or, if he wishes to be blessed, he may accompany the faithful, but upon reaching the priest, simply cross his arms, signalling he can’t receive the Body and Blood, but may receive a holy blessing...