hi,im wanting to try this google adwords program, i am currently on the adsense program and looking to try the adwords.has anyone ever used this?how do i pay for it,say i have a budget of spending maybe $50 per month for only one month.i want to use the 50dollars as a trial to see if it works in promoting my adsense.also,how do i pay for this?can i use a nija debit card or wat?plz help and advice.