paperwork – Sponsorship for UK visa

I am a Ghanaian studying in Ukraine and I am applying for visa to visit my uncle in the UK. My dad is sponsoring, so I provided his bank statement. Do I also need to provide my personal bank statement which has a lesser account balance(to prove that I am catered for in Ukraine)?
Is it okay if my uncle does not provide his bank statement?
Also, should I add a cover letter from my side?
Is £1000 too much or to small for a duration of 14 days in my uncle’s apartment?