Kamara joined last month on loan from Major League Soccer club Sporting Kansas City and his introduction just before the hour breathed new life into the Canaries, who were trailing to a first-half goal from Leon Osman.
The 28-year-old powered in a header from a corner to equalise with just six minutes left - but there was still time for Norwich to grab a first win in 10 Barclays Premier League games as captain Grant Holt scored at the far post deep into stoppage time.
"Kei is a different type of player to whom we have up front and we are delighted for him," said Hughton, who had started with both Holt and January signing Luciano Becchio in attack.
"He had been here to England before (on trial at Stoke), but these things are all about timings and it was right for us.
"He has that ability to get beyond and is good in the air, he gives us good possibilities.
"It is always a bit of a risk because you are bringing players over who you don't know how they will settle into the league, but he is a lad who wants to do really well and it is a good opportunity for him."
Norwich could turn Kamara's loan move into a permanent deal at the end of the season.
For now, though, Hughton is taking things as they come.
"Kamara is a very good character, very down to earth and is really delighted at the prospect of being at Norwich and in the Premier League," he said.
"We will have to see how he develops, but this is not a particularly tough group to integrate into and he has fitted in very nicely."
Norwich's hard-fought victory gives them some more breathing space over the battle for survival, having finally won in the Premier League for the first time since December 19.
"Once you are 1-0 down and you get back to 1-1, you have to be honest and say you settle for that," said Hughton, whose side had gone on a superb 10-match unbeaten run earlier in the campaign before hitting the buffers over Christmas.
"But the lads wanted something different and showed great drive and determination to get the winner.
"We are past the 30-point mark now, so for us and the team, that is a big confidence booster."
Defeat was, though, somewhat harsh on Everton, who had been the better side for long spells, with Marouane Fellaini central to all their attacking threat.
Everton manager David Moyes bemoaned his side's lack of a killer instinct in the second half, when they could have put the game out of reach.
"We had controlled the game, but were wasteful in the second half when we had chances to get another goal, and we were always going to be put under pressure at the end," he said.
"I cannot understand why he plays three minutes and 20 seconds for the stoppage time, but he has got that discretion, although I disagree with it.
"We passed it well enough and tried to do the right things, but we were not good enough in the final third - but one thing is for sure, we did not deserve to lose."
Everton remain in sixth place, six points adrift of Tottenham, who play at West Ham on Monday night.
"There is still chances for us to do it (get into the top four), but we are going to have to be very good to do it," he said.
"However, we should have seen this one out, if we have any real ambitions, then we have to make sure we do not lose that game."