Agree with everyone above - if it's a good dojo then everyone there will be fine with that.
It would be unreasonable for anyone to expect someone who's just starting out to keep up with a group of people who've been training for months or years.
Besides, I bet most people struggled during their first few training sessions... I know I did, I think I needed an oxygen mask at the end!
LW: Florian, Sherk, Lauzon
WW: GSP, Penn, Parisyan
MW: Silva, Franklin, Lindland
LHW: Rampage, Liddell, Henderson, Bisping
HW: Couture, Arlovski, Emelianenko
Afroninja: Faceplanting for your entertainment since 2004!