British Bais Yaakov’s do not focus on mefarshim like American BY’s.
age – i’m not sure – perhaps a 18+ girl might have harder time getting in.. not sure. they reluctant to take girls who will not stay the 3 yr course. not that anyone knows what future holds.. but its a commitment that they do like. That is certainly something that you should stress in your application – that bearing unforseen circumstances, you do intend to stay 3 years.
Rabbi Falk – also Bedikas Toli’im (bugs!) very interesting.. but only in 3rd year. Hilchos Brachos in 1st year. Yichud.. and otherstuff i can’t receall..
basic teaching/social/educational skills are taught in 1st year. More taught in 2nd year. Actual hands on teaching etc is in 3rd year. sometimes at end of 2nd year, you might start observing in the schools.. all depends on how many girls in each class..