Toyota Repair: Is it difficult for me to change the o-ring or seals for my distributor where I might have an oil leak., correct tools, easy job

Question
I have an oil leak on my 1991 V6 toyota Camary. I was told by the dealer that it is probably coming from the seals around the cam or the distributor. I loaned my car to a friend and she had my oil changed and this little drip is becoming a puddle. I want to keep the car and I will order a new gasket set for valve covers, oil pan and the distributor.  I'm machanically inclined and have the correct tools, but I don't want my car to become a monster of a job. Thanks for your time and concern on this matter. Also I would like to know about the quality of the parts that you sell. What brand to they compare with?

Answer
Replacing the valve cover gaskets is not an easy job, it normally takes about 3 hours using air tools, using hand tools it will take more than 5,especially if you have never done it before. It helps if you have a manual that can show you step by step,or you can just start taking it apart, it sounds like you won't have a problem doing that.