Not going into drive but does reverse

My husband changed the solenoids and fixed our
honda the night before he passed away after it had
been sitting for a week but not exactly sure what all
he had done tho. When we bought it, it had slipped a
little but we had started manually shifting bc it
slipped pretty bad when we pushed the gas pedal. We
shifted from 2nd to drive but couldn't 1st to 2nd bc
1st was out and it didn't slip as bad as it would every
other time. I forgot about the slipping right after we
bought it and used cruise control, after hitting about
35 miles per hr, the entire time I pushed the
accelerator on the steering wheel while it was on it
didn't slip not one time no matter how soft or hard we
pushed it. 2 days after he had fixed it I was on my way
to the funeral home to plan his funeral, I was pulling
up from a hill and it slipped in drive n wouldn't move
but would go good in reverse. Please I love my car