As far as I'm aware, it's not just a case of renting a croft and moving - you have to be approved by the crofters commission who will consider things like previous experience, relevant skills, your knowledge, local support and family connections to other crofters / small holders.
I'm a member of the
Scottish Crofting Federation who run introduction to crofting courses and hope one day soon to move and have a croft myself.
I hope that that doesn't put you off, but investigate first - I'd suggest you suss out and nail down the areas you like, and compare them to where you're likely to find work. Spend time travelling in Scotland - it's taken me 7 years to reach the point of I know where I want to be, and to be at a point in my life where I can move with the speed you need to to secure work. ' Scotland ' is a big target to hit, you need to find out where you're comfortable, where you fit, and where your skills are needed in the community. Would you like the lowlands, the highlands, the west coast, Ross-shire, Aberdeenshire, Fife? For me, I do heavy engineering so I'm pretty much confined to Aberdeenshire, but would dearly love to be on the West Coast.
It's also worth noting that crofts, and crofting are predominantly in the North and North West - Ross-shire, Highlands and Inner and Outer Hebrides, and the grants available are only available in the crofting counties. There is a move afoot to try and bring crofting to places like Moray, but you would have to be very comfortable with crofting and animal husbandry as you would be pretty much left to your own devices as a trial.
I hope that's a bit helpful and doesn't put you off - I'm off on holiday to Moray from the 5th November and have organised a load of interviews with companies and recruitment agencies for whilst I'm there. You can make it happen, but you have to push really quite hard for it!
Dan.