I am sure some teach in English. Yes, as with preschools. It's a good area for families to live. Applebee's and McDonalds top the list. Many different stores with different values.
Language schools are everywhere, for all different levels and incomes.
Available at some bookshops and Kiosks and always at train stations. Where I live, both the economy and job market are growing. With several military bases in the neighborhood, there are all kinds of social groups and levels. The Dutch are usually very casual, but can be formal on occasion. You can get your own General Practitioner or house doctor.