Please I Need Some Advice From The Experienced

[Salty80]

I would like to go to Britain to learn English
Can you recommend me a language institute that is good and has reasonable prices?

[Buenchico]

What type of course are you thinking of, Salty80? Are you just looking for, say, a week or two of intensive learning or are you thinking of a far longer period of study?

[bookbinder]

https://www.lsi.edu/en/english-school/learn-english-in-england

[Salty80]

I want study for longer at least 16 week

[Buenchico]

Coming from Georgia, you'll need a Standard Visitor Visa to study in the UK for up to 6 months:
https://www.gov.uk/standard-visitor

While there are language schools in many large cities (such as London, Cambridge, Oxford, etc), the city most associated with English is undoubtedly Brighton; it's packed with language schools. So this might be a good place to start your search for a course:
https://www.languageinternational.co.uk/english-schools-brighton-21751