Aoiro-sama
This is Kawaguchi Hidetoshi. This is my humble answer to the question.
“Is it OK to come into contact with Buddhism regardless of denomination?”... Yes, it really doesn't matter, and it's rather important.
The Buddhist theory, as it is called the “84,000 Dharma,” has a huge number of teachings. Therefore, there are places where it is impossible to unequivocally say that this is correct and that is wrong, taking only a small part of the teaching. Therefore, I recommend studying Buddhism in general in a balanced manner as much as possible without thinking that only teaching this purpose is enough, or that only this way of thinking and interpretation is enough.
Also, in the midst of that, I think it is important to carefully examine and repeat rational tests, accept what you are satisfied with and not accept what you are absolutely satisfied with and not accept what you are absolutely not satisfied with.
Also, Buddhism has a strong philosophical aspect of practical thought. As we put what we have learned into practice and make use of it, it is necessary to further advance learning and practical training in parallel.
Also, I hope you can refer to the various humble answers to the questions below.
Question “For some reason I can't decide on one...”
http://blog.livedoor.jp/hasunoha_kawaguchi/archives/1002969128.html
Question “How to learn Buddhist thought regardless of denomination”
http://blog.livedoor.jp/hasunoha_kawaguchi/archives/1002944760.html
Question “Please tell me what you thought 'this teaching doesn't fit the present day'”
http://blog.livedoor.jp/hasunoha_kawaguchi/archives/1002902054.html
Humble answer category “On the teachings of each denomination”
http://blog.livedoor.jp/hasunoha_kawaguchi/archives/cat_319881.html
By all means, let's work hard together to learn and advance Buddhism.
Kawaguchi Hidetoshi Gassho