In reply to jugpuller:
I was taught to touch type as a radio operator in the RN. Like many Its something I value even more now we've all got computers and the like.
I've seen the Mavis Beacon software and you should manage with that. But...... it needs lots of discipline and patience to use the correct fingers for the correct keys when you are learning and you might find it too much of a temptation to look at the keyboard all the time.
If you have a spare keyboard you could try to tipex out or perhaps put small bits of tape over each key.
A better way is to blank out the keys each finger uses as you learn them. So for example the keys you normally use with your right forefinger are y,u,h,j,b,n,. Once you have those memorised and can use them and know where they are instinctively blank them out, then go on to learn another finger and do the same for that. If you use different colours for different fingers it makes a lot of difference too when you're learning. You only need four colours as they can be used for left and right hands similarly - so green or whatever, will do for little finger on each hand.
Once you've got going stick with it. Half and hours practice each day and within a few weeks you should be able to notice your speed increasing considerably.
Good luck!