The Glovers' late consolation, an 85th minute spot-kick slotted home by substitute James Hayter, was their first Championship goal at Huish Park this season and the first goal by a Glovers forward.
Their wait for a home win this campaign goes on but Johnson took heart from his side's display in what he saw as an evenly-matched 90 minutes.
"It is a learning curve for our boys" he said.
"We haven't got that many lads with experience in the Championship like they have.
"You could see that both teams played with a tremendous amount of power and pace but they just had that little extra quality where it mattered in their two goals.
"We still gave it a go and it was nice to get a home goal.
"We did create a good Championship football match and we were part of that - maybe the difference was that little bit of quality needed to score a couple of goals every game."