No offense tho because I don't go to church

None taken (in my part atleast haha), well, this means that if you accepted Jesus Christ as your Lord and saviour, you are saved! We don't deserve to be saved for all the sins we've done and no amount of good deeds can make up for that. That is why it's considered as a gift given for us ^^

No one can boast about how they were saved by good deeds. Besides, if we were to do good things just to have salvation from sin, then what gain did Jesus get for dying on the cross?