When I first started riding a bike again, which was not too long ago. I weighed 347# and 6'1, So I bought a used Trek 950 Steel lugged frame bike it was a mtb.
I put on different handlebars ones that had a 5.25 " rise cause I like to sit up straight when riding, II am not into the hunch down try to be one with the wind etc.. or go fast as I can.. that is not for me so it might work for you also. Check craigslist but do look for double walled rims with 36 spokes, now seats, I think to each his own. I first bought a 200 dollar brooks saddle the B190 it was nice and big felt good for a while but there is a front spring that just gets in the way. then I tried a Brooks B67 sprung saddle that was ok, but not exactly then I tried the Selle Royal Gel saddle with a spring it was great just what I needed. SO keep trying saddles till one is just right.
main thing get out there and go around the block for a few days and increase from there. you can do it