Hello abc12345, I was once a prospective ger, I studied intensely for about 5 years and continued to be rejected by Orthodox rabbis. Now I understand that conversion may be appropriate for some people, but it was not appropriate for me. Its good that you recognize that other religions which proselytize are false and wrong; but this recognition does imply that you are required to convert to Judaism.
Before you will be accepted into a charitable Yeshiva, I think you basically have to have converted already. If you can pay tuition, the options are better for you.
Are you male or female?
Why do you want to convert?
Where do you live now?
What sort of skills do you have to earn a living?