You might be best asking @mnhq to move this to Scotsnet where you will get more replies.
But here is what you do.
Get a Scottish solicitor
When you see a house you like ask your solicitor to put in a 'note of interest'. This means that if someone else puts in an offer, before you, the seller is obliged to let you know.
If the seller receives more than one note of interest they will put a 'closing date' on the property. What that means is that all interested parties put in a sealed and best bid by the closing date and the best offer wins.
Alternatively you can put in an offer straight away. Houses in Scotland are usually put up for sale as 'offers over'. You have to decide how much to offer over by. Your solicitor or estate agent will be able to advise on the going rate for the area. e.g. 5% or 10% over. So the House Report might value it at one price and the seller might ask for offers over another price. You need to decide what you are willing to pay.
The House Report is paid for by the seller. Its a legal requirement and gives you things like a valuation, condition report, eco friendly stats etc. There really is no need to commission another survey. This will do the job.
All offers are made via your solicitor.
Once you make an offer and it is accepted you are legally bound to buy that house. There's no gazumping etc in Scotland. If you pull out you will be liable for considerable legal costs.
Think those are the main things.