Since you are VERY new to this, a few key points to keep in mind.
First and foremost, it will be for real and you will not be roleplaying an imaginary character in your head any more.
Second, accept that whilst you are learning some things will go wrong and not be how you thought/hoped they would be. You will have some cold and wet nights. You will have some rotten night's sleep. You will get tired and struggle as you work things out. This is normal.
Third, don't go too remote to start with. Because if you are having a horrid time (and you absolutely may, to start with) you will be a short walk from comfort and civilisation. March time in Scotland can still bring some challenging weather, possibly too challenging for someone VERY new to this, so being within a short walk of somewhere safe is a wise thing to do. Once you've got a few trips under your belt (or sporran) then go remote.
Fourth, all the decisions you make will be down to you and you will have to take responsibility for them. Don't become a statistic.