As long as you completely reinvent yourself and know how to massage it will be fine. Would be easier if you toured in a different area to where you escorted because a lot of guys like going to the happy ending ladies because they don't do sex.

That's why I had to leave Glasgow. I had all my regulars who saved my profile in their hotlist. When that profile was removed AW allowed me to start a new zero feedback profile. (Cunts). Not many of my regulars found me and I ended up with all the wankers who target new profiles and don't read plus the guys who walk because they haven't read that you don't do sex.

Don't ever be tempted to go the extra mile like I've done on a couple of occasions and ended up having sex with the clients. To my horror every intimate detail was shared on punter forums and I had clients since then expecting the same things.

I've spent a lot of time offering just massage and happy ending services, in fact I alternate between full service and massage depending on my mood and levels of energy!
To transition to massage and HE you can advertise on specialist massage sites and tweak your marketing. There is a high demand for it. Depending on your expertise you can advertise a fully qualified Swedish massage (or similar) or simply a sensual backrub or even tantric massage. Prices tend to be a bit lower but that's not written in stone and I've seen ladies offering massage and HE for ?150 per hour. As always it depends on how you market yourself.
It is very doable so go for it!

Don't ever be tempted to go the extra mile like I've done on a couple of occasions and ended up having sex with the clients. To my horror every intimate detail was shared on punter forums and I had clients since then expecting the same things.

I agree with LOTM!  I started out doing massage/happy ending and found that a lot of customers pushed for extras.  I too made the mistake of going farther with some (RO and full sex with a few) and each time I did they would post the details. 

There were some that made it feel like a contest--how far they could get me to go.  Not that this doesn't happen to me now that I'm a full service provider, but the vibe was different.  Not sure how to explain it.

There is def a market for massage/happy ending but the prices are lower for most in my area.

I'd also recommend taking classes if you haven't.  The quality of your massage will often be reviewed and many are truly looking for a therapeutic massage, not just the happy ending.

Best of luck in whatever you decide.