welcome!
that's how i started, more or less!
ran cross-country (1yr) and track 1.5 +3k, (2 yrs) in hs. knees and ankles (particularly) gave me grief, so i graduated to bicycling!
i suggest starting low cost (used mtb or road bike, even tourer). find what works for you.
i personally am big advocate for multi-geared touring road framed bikes, lwb, chrom-moly-d/b, fenders, racks (f/r), panniers.....but also ride 'bent, etc if you ride on the road.
find what works, and welcome x2!!
tomg