Mag IELTS or TOEFL kayo. Cost is about 9000 pesos? Maybe more now. It will test your reading, writing, listening and speaking skills in English. Pag pumasa kayo with 8 or 9 points per category, pwede na ... (usually, this test is only taken if you are attempting to work or migrate abroad, depending on the country.)
I have tried TOEIC (school requirements) and nakatulong siya malaman about where my proficiency is in my English language. Helpful manood ng mga english series or TV shows para alam mo how they construct sentences (probably hindi tama yung grammar nung iba) but still it would help you know words. The best in my opinion is reading books.