2. You don't need to notify HMRC when appointing directors, but you will need to notify Companies House
3. Unpaid directors don't generally have service contracts, but they will have duties to the company"
You said you'd registered as a sole trader. Was this with HMRC?
You can't "convert" a sole trader to a CIC, so you would need to form a CIC.
On the other hand, if you already have a company then you can convert this to a…"