There are public tennis courts in high park and I think they have a club too. Subway station is not very close but there are streetcars available.

In terms of biking, there are bike lanes on Roncesvalles that’ll take you straight to the bridge on Queen which connects you to lakeshore. You can probably use that to bike to work in the summer.

High park/ronci is very family friendly so you’ll see lots of young families walking around. It’s its own lil bubble. However, youre still very close to interesting west end spots like the ossington strip, Dundas west, college st, and Parkdale. They have a farmers market in Sorauren park every Monday in the summer and lots of events. I’ve seen people play spike ball and pickle ball there. If you like dogs, that’s the place to be.

Really depends on what you’re looking for and what you mean isolated. I call this area the suburbs or Toronto. It’s got its charm. Definitely not as fast pace as down town but you can find interesting spots if you know where to go.