Does anybody know how much it usually costs to get the motor mounts replaced? OR how much it is to purchase the parts and do it myself? Also, is it easy enough for me to do it myself? If so, how?

Please don't tell me just to take it somewhere. I may be a girl and not know A LOT about cars, BUT I'm the kind of girl that takes things apart when they stop working and fixes them with no problem if its easy enough or explained properly. If changing a motor mount isn't extremely complicated, I'm very capable of doing it if anyone can tell me how please and thank you in advance!!