Hi, and welcome to the forum.

Perhaps someone has somewhat different experience in France, but honestly the only "financial advisers" I've encountered over here are the "conseillers" at the bank - and they're there primarily to flog the particular bank's services. Some private conseillers operate telephone boilerrooms, calling around to sell various investment plans designed to reduce taxes for entrepreneurs, but that would require a fairly good understanding of the French tax system. (I take lots of blind calls from these guys and honestly, I'm not too impressed with what they're trying to sell.)

Those who need higher level advice than what they can get at their local bank generally deal with an "expert comptable" (roughly equivalent to a chartered accountant or CPA). In any event, your French would have to be very fluent and you would probably want to concentrate on banks with a large expat (i.e. anglophone) clientele.

English as a second language is not a terribly lucrative field in France, though finding a job shouldn't be that hard. Some schools take full advantage of unqualified anglophones looking for a job in order to avoid paying for teaching certification. The best opportunities are through schools that focus on the corporate training market - teaching business people English for use in their jobs. Due to the public schools being part of the French civil service system, it's extremely difficult for a foreigner (even from within the EU) to get hired into the public school system.

In any event, take a look at a jobs site like Monster.fr and see what you think of the positions on offer in your respective areas. It will at least give you some idea of the types of jobs on offer and possibly the salary ranges.
Cheers,
Bev