My first job was instructing. Everybody does it differently, and some end up in the same place. Some get there, and some don't. What I'm saying is that there is no formula to get the jobs you want. I'd suggest getting a job in a flying school away from the city. They generally not only do instructing but also charter. Twin time is what you want, but you don't normally get it straight away, you have to work for it. If you don't have the instructor rating yet, use it as a bargaining chip. Tell them you'll do it with them...but can they offer you some work afterwards. It starts from there. You then get to know people, who know other people, and you move from job to job, gaining experience all the time.
That's my advice anyway, but as i say, everyone has done it differently and still achieved the same goal.