I'm thinking of changing my religion to Catholic from Anglican...?

What will the Catholic congregation think- will they welcome me or think 'not another convert'? Also I do not know fully how to take part in the Catholic M e.g crossing myself at the appropriate points and knowing the proper responses - do not want to look stupid or look like i'm being disrespectful. Am I actually allowed into the M, as I'm not Catholic? I know that I can't take communion in a Catholic church as although I'm baptised it is in the Anglican church, so I'm barred - although I can go up for a blessing. I'm worried about contacting the local Priest as I'm worried what his reaction will be - will he tell me to stick with the Anglican church? Thank you!