Windscreen Wipers help needed

Huge apologies if this has already been answered. I had a good search and could not find anything that matched my problem.

I have a 2005 vRS which is fab, love it to bits. About a month or so ago my wipers stopped working while driving so I switched it off. About a minute later I tried again and they worked. This continued to happen but very irregularly. It would mainly be on intermittent where in between wipes it would fail completely. Rear would work as would the washers etc just no wiping at all. If it sits on normal wipe it will continue to work ok. However if you turn it off then a bit later turn it on they won't work until it is off for about a minute. When it does start working you have to depress the single wipe function and hold it till it has finished a full wipe and then it will be fine otherwise it stops half way through and you have to wait again.

The problem is now happening very regularly now. I have checked the bonnet catch and the fuses and all appears ok. My question to you guys is what do you think it is? Could it be the motor or something else?

If it is the motor is it failry easy to change using the manual? I am a girl but not totally blonde lol