Hi everyone, im new to this site and hoping for some information.

I am currently employed at a hotel and work night shift. I work 4 nights then get 4 off. I am hoping to register as self employed whilst staying employed at the hotel. This part seems straight forward.

I have previous experience in the landscaping industry and its good to produce work to be proud of. If things go well then I would leave the hotel and work purely in landscaping. At the moment I would only be doing this on my 4 days off.
The main information I need is regards tax and national insurance etc. Ive been through the hmrc website and found some information but they make it sound overly complicated. I know i would be doing a self assessment tax return and will be paying 20% tax on anything I earn since im already over the personal allowance with the hotel job. National Insurance im not so sure about. Ive read about class 2 contributions etc. I dont expect to be making alot of money for the first year or two.
Any help regarding this would be great.

Thanks in advance.