Congratulations on printing. D-76 is not a good print developer, you will need some Dektol or Bromaphen or similar developer expressley for paper developing. Paper should remain in developer for a full two minutes with constant agitation, followed by a 10-30 second dip in stop bath and then into the fixer. Fix time is determined by the brand and dilution of the chemie, it is usually printed on the container it comes in.
Printing B&W from color is dificult at best, requires long exposure times and very hard grade paper, like #4 or #5.
I am happy for you on getting started, keep printing and keep shooting!