If you are in a rush, or need hints and tips for this task, try asking nicely on here and they will guide you or maybe even if you are very nice do this first job for you if you are in a hurry.
https://www.talkphotography.co.uk/forums/
Its free to join, they never mail you about anything unless you request stuff, dont sell your address and are generally a very helpful and kind bunch.
How quick you pick up skills of your own depends on
1) how good you are at learning
2) how good your art skills are. Retouching is ok to a certain level, then you hit a wall due to how good or bad your general artistic skills are. People tend to forget the artistic element is an issue, though practise certainly helps.