IF you have the mechanical ability, the correct tools (or are willing to buy them) and the thirst for knowledge, I think you should take the plunge. Yea, you might fudge something up - but that is just part of the learning process. Start with ONE and make sure you have spare/factory parts in stock that you can start with. If you screw up the "spare parts", just re-install the originals and take it from there. If you never try you will never learn.
Jerry Kuhnhausen's book is a great source and there are many videos on this subject on Youtube. Just go slow, do a little at a time and reassemble often to check for fit and results.
The great part of Smithing S&W revolvers is that they are all quite similar so once you understand the first one and get comfortable, the rest will be easier, better and more rewarding. If you find you have two left thumbs (or just lack the ability) then you should use a Pro.