If you have decided that building your own home is the best option for you, then understanding how it works beforehand is a good idea, as you will want to avoid having problems as much as possible! Much of the work is done at the planning stage, and it is important to find a good architect like this Monmouth architect to work with you https://www.hillsandcompany.co.uk/
As well as being able to offer you advice and ideas, an architect will also have a good understanding of how the planning process works and will be able to help navigate you through it. Feeling nervous is something that is quite common when it comes to getting planning permission, but as long as you comply with planning rules and regulations you have no need to worry about this.
Another thing to do at this stage if you have neighbours, is communicate well with them and let them know of your plans. Building work can be problematic to live next door to and your neighbours will appreciate you keeping them informed and asking if they have any concerns. Building a good relationship with them will also reduce the likelihood of locals resisting the plans that you have.
Before you start to build, it is a good idea to also discuss the plans that you have with your builder so that they are aware of what it is that you want and that everything is clear to avoid costly mistakes being made.