the official list of charges, referred to as "articles of impeachment", hasn't been made public yet. I expect it will be fairly comprehensive, which is to say extensive, from the obstruction of justice activities up to and including the 'quid pro quo' interactions with Ukraine. you can find more general information about impeachment under 'Articles of impeachment' in Wikipedia. if the process or the offenses are still confusing, i strongly recommend adding some several new news outlets to your usual sources. while they all have their particular slant, you can usually get a sense of the facts by comparing the various perspectives. hope this was helpful. there may be hope for you yet ( :