new thing to frustrated

I have resign from my previous job , and yeah...another new job i am starting now , but it's so frustrating when i dun really do well in this 1st 2 day in my new job . i think after i pick up all those thing , i will be really bored for these job , design name card according to customer request , stamp upon request , label sticker upon request too , yeah...mostly are customer service , and i have to count my own comission , i hate counting , my math suck ! I think my manager are being strict to me , at least i think so , but she being really layback to those , consider my senior i guess ....*sigh* feel like familar with one ex-collegue , remind me how she used to be so " unfriendly" because i am so damn stupid , i wish i can do it and really familiar with it , i feel so frustrated and stressed now .....hopefully i can reverse the stressed into desserted