I have self managed and let for 10 years. I have given in and am starting to use an agent!!
Do not let to friends. No no no. And most certainly don't let to friends who are bad with money, when the chips are down it will be you that gets paid last. You need to deal with strangers IMO, renting out can get fraught on both sides, you do not want to have a link to the people.
Unfurnished does not need curtains, or anything really except flooring, and a cooker. (Obviously a fitted kitchen and bathroom). My rental house is literally empty, bar blinds at the downstairs window - and that is for my benefit while I'm waiting for a tenant). Sometimes they will ask for a washing machine. Leave nothing else in please. It is more to look after, and more to get damaged.
If you want to store your things in the garage, then do so and do not include it in the let. Lock it up and give them no access to it.
Then get an agent to value it as it is. There will be a standard rate for say a 4 bed detached in the area. It might be £900 - £1000. The agent will advise which price best suits your house. Even if you do self let, but with the greatest of respect you sound a bit too nice and a tad niave about renting out houses and it is a bloody minefield - trust me, so please consider using an agent who will keep you right. LLs get a bad press but trust me the law is stacked hard against is and one little slip up on something is heavily penalised.
Take a through inventory and get it agreed with the tenant about current stains etc.
And try to distance yourself from the house. I've said this on another thread on here today too - tenants will not treat this house as your home, they will treat it as theirs and that can be hard to get your head around, especially when you say you have done work to a high standard etc.
I've just finished my rental house, and I was looking at the lovely new floor and thinking - wonder how long untill that is scorched?! But then I have had my fingers burned 