Hi balsto welcome to the friendliest most helpful bunch of nutter you could wish for

before anyone gets into the Bodhran jokes let me start seriously.

Any percussion player from Timpani to shaky egg has to have a sense of timing and rythm. When you get into the feel of a tune you can somehow sense the change of tempo before it happens.
Don't try and jon in at the start of every tune. listen for a few bars and get the feel, click or tip at the first beat of a few bars then go for it!!
This has the advantages of letting you make sure the tune is not too fast to join in with cofortably and also shows the other musicians respect because you are listening and learning and not just showing off.

Oh and I hiope you have a set of good, real bone, bones they make all the difference.

Good luck,

Andy (Bones, Tea chest bass, Concertina, Voice, but mostly Fool)