A few things that might help in deciding about going to university in the UK:
The UK system is structured so that in the last 2 years of secondary school you study 3-4 subjects (A levels) that are usually fairly tightly grouped by what area you want to study in university. So, if you plan to study (say) chemistry in university, you will certainly take chemistry, probably math (calc BC) and another lab science.
When you apply to university you typically apply to study a specific subject (eg, chemistry) or a tight group of subjects (eg, natural sciences), or pre-paired subjects (eg, history + french or economics + politics). In most cases, the course you apply to study is very structured: you have few (if any) choices in the first year, and when you do have choices it is usually from a list of related courses. UK universities are great about posting a lot of detail: look up whatever subject you are looking to study.and you will find info right down to the classes you will take each year of the course.
So, when you apply to a course in the UK it is important to know what you want to study, and to be prepared to study just that for all 3-4 years of the course.
It is also important to understand that where specific subject requirements are given, it is because it sets the level of background knowledge that everybody brings.
Some UK unis will use a year of college (sometimes community college, sometimes full college/university) instead of APs, but the only way to find out which ones is to go to the university website and search ‘international qualifications’. For example, University College London will accept 1 year of community college- but with a GPA of 3.3, a HS GPA of 3.3 and a new SAT of 1380. Others will accept an Associates degree, without SAT. Note that your CC credits may get you in, but they won’t get you credits toward graduation- you will be coming in as a first year. Remember that the UK system is built for UK students, so your situation is unusual, and they won’t have a lot of experience with it.
Also, most UK unis offer a ‘foundation’ year, in which you take classes that will qualify you for application to unis. The vast majority of students in ‘foundation’ years are getting their english up to speed, but it is another pathway. Note that they are not inexpensive, and only prepare you to apply- they do not guarantee a place at any university.
A side note: although there is variation, in general the UK system tends to put less weight on continuing assessment (homework, quizzes, papers, tests) and much more on fewer, bigger exams (in some cases, a final exam is most or all of your final grade). Think carefully about how you work: some people struggle with the self-discipline to keep studying throughout the term when nobody is checking.
Finally, there is the question of finances: there will be no financial aid; you will pay international fees, and tuition does not include accommodation, and you may have to prove that you have enough money to cover living costs for the year in order to get a student visa.
A big question, of course, is what you want to do with your degree, and how recognized it will be in the US.