Hello.
Your chances are really high. From experience, schools and training centers hire non experience teachers all the time. You just have to be careful with the contracts you sign.
Just apply and show a lot of positive attitude in the interviews. Also, go online and check out videos of ESL teachers so you can get an idea.

How that helps.

If you have a BA level degree, (even if it's not in English) you can be legally employed and get a Z (work) Visa. There are hundreds of jobs available, just check the jobs section of this (and many other) sites. You don't need any teaching qualifications, (which is a bad thing in my opinion), however having them will make you much more competitive against other candidates.

There is much more call for English teachers than Spanish, however, unfortunately, most employers want native English speakers not just fluent, so while you will be employable, it will be more difficult if you aren't a Native speaker.

If you don't have a BA degree you cannot get a legal Z visa, however there are still very many employers (and agents) who will employ you by getting you fake qualifications or plain just ignoring the law, however you will be illegal and there are a lot of unscrupulous employers who will use that illegality to make you work longer, for less than they say, worse condition, basically just screw you over. Also the authorities are clamping down on people working on tourist visas (in the first tier cities at least) and even if you find work (illegally) you will probably have to do a visa run to Hong Kong or somewhere every 3 - 6 months to exit the country to get another visa.

It depends upon the province, the city, the locality and the relationship of the school with the authorities and the particular supply-and-demand feature of the moment.  To a lesser degree, physical appearance also matters.

There are Spanish English teachers here in my city. My advice, try smaller cities.

You could always learn the Chinese language, be fluent in that, then become a translator! Translators earn good money! Not sure how much they earn exactly, but I know you'll make a comfortable living if you can do so. (!

He he, I said: "money"!

To be honest, I don't think it's as easy to find a job here as before, especially if English and Spanish are your only skills.  But having said that, finding a mediocre English-teaching position should be do-able, but you may want to consider moving to a smaller city and having low salary expectations. China, especially Beijing and Shanghai, is starting to get a lot stricter about the hiring of English teachers especially following a spate of scandals involving foreign pedophiles. If you really must move to Beijing or Shanghai, I would suggest trying to make connections with the Spanish community there. In Beijing there's also the Instituto Cervantes and Embassy who may have job info and links to Spanish-expat forums.

you have to get a z visa without that your chances are zero to none but if someone does hire u they will take advantage of u