Good to hear you want to get into dowsing. I would like to help you more but am not sure when I will next be over to the Isle.
You are right about the names to places and we should not read too much into them when it comes to looking for energies, but that said there are lots of earth energy linear concentrations on the Isle of Wight including 3 big 'Dragons'.
There appear to be several terms people are using when describing these things. I understand Leylines to be straight line alignments between 3 or more sacred places on a map. Some people look for these Ley line alignments as an indication of where to find Earth energy lines. True Leylines, to my mind, have associated with them a pair of Earth energy lines (I now call these Earth energy linear concentrations as there is evidence they are part of a field of energy and these are places where their appear to be concentrations that are easier for us to sense)
If you can use a pendulum you will find dowsing for Earth energies fairly easy and there is plenty of help on this site and forum to help start you off.
it is Interesting to hear about the Holy stones and them getting hot. I think I have heard something like that before so if anyone on the forum can remember anything about this sort of thing it would be interesting to hear about that.
As for helping you to begin with, my suggestion is to start where there are the largest concentrations of energies. Once you get to one of these places just meditate whilst standing on the lines and ask to become familiar with the energies of that line in a way that will help you sense them more easily by dowsing when you are elsewhere. Then look to dowse the edges of these Linear concentrations and then ask to be shown the very middle of the line. Once you can do that you can move several steps to the side and soon establish a direction. Having been able to do those things you will soon be able to track the lines and find where they cross over. It is at these places that life gets even more interesting. What I mean by that you can find at (http://www.keytosecretoftheancients.com
I mentioned 3 large dragons on the Isle. I have already mentioned the first two in this thread on the forum and would recommend visiting the church between Nettlestone and St Helens and the old St Helens church on the shore. You should find the NE SW line here. That would be a good place to start to meditation to get better and sensing them.
The North South line is tracked from the mainline to cross around here as well but you may need to go to Bembridge to get further East to pick it up.
The third large Dragon (pair of 30 pace wide energy lines) I have only just tracked across the mainland. It comes across from South Wales in a NW SE direction and looks to be coming on shore on to the Isle of Wight on its Western end. By bizarre quirk of fate Arthur in his earlier posts on this thread was probably sensing this 3rd Dragon as it looks to be heading for the Long stone just North of Hulverstone & the church at Mottingstone. This gives a very real possibility that this Dragon will cross over with the original one I rediscovered that runs from Tonbridge Wells to the NE across SW to St Helens. The likely cross over of all 4 lines would be around Brighstone and Shorewell. The Tumuli on top of Cheverton down offer some good clues to start looking for these lines as well.
If you do look for them these will be around 30 paces wide like the St Michael and St Mary. (20 pace, 10 pace and 5 pace wide lines will not be these large Dragons and there will be many of these lines in and around the area as well).
If you keen to look for these lines you could well be on to finding one of the most sacred places in the UK. There are not many places where two large dragons cross over where all 4 lines come together. St Michaels Mount in Cornwall is one such place and Hamish Miller and Paul Broadhurst found that so you would be in good company if you found a similar node on the Isle of Wight. There are 3 out of 4 lines crossing over at Royston near Luton and there are only a very few other places where this happens in this country.
So if you find a strong node somewhere, try doing your crystal therapy on that spot. I am willing to bet you will notice and significant increase in the level of success from the therapy.
Anyway, I hope I have not put you off with my passion for the subject