The Rotherham wideman has signed a six-month loan deal with Stuart McCall's team and will be in the manager's squad for Saturday's home clash with Kilmarnock.
The 25-year-old found himself out of contention at the Millers but admits few of his friends were keen to point him in the direction of the Scottish Premiership when Well came calling.
However, former England Under-19 cap Ainsworth says the chance to show off his talents on TV was too good to turn down.
He said: "I didn't realise how big a deal the Scottish Premiership is until I got here.
"When you are across the border and playing in League One or League Two, there is not much talk about what's going on up here. If there is, it's negative. 'Oh you don't want to play up there,' people will tell you.
"But there are a lot of players who have come up and enjoyed it. I've only been here a couple of days and I'm loving it.
"I didn't even have one second thought. I was watching the Europa League when Motherwell were in it and I thought it was amazing.
"I'm not sure why the Scottish game is seen the way it is in England. When you see how televised it is, it's massive. You don't get that in League Two or League One. I've played for a lot of clubs and been on TV two or three times.
"I've had friends tell me I shouldn't be coming up here because all they see is the English Premier League. But the Scottish Premiership is just as big.
"It's taken off in the last few years even more with Celtic getting into the Champions League and Motherwell being in the Europa League. I want to be involved in that."
McCall has long held an admiration for Ainsworth - who makes Motherwell his 12th senior club following eight previous loan spells - after first spotting him during his spell as Bradford boss.
But the new arrival is hoping to settle down and make Lanarkshire his home for the foreseeable future.
He said: "I remember Stuart from when I was a youngster when I was at Hereford and he was at Bradford. In those days I was flying and I hope I can still fly like that. In fact I think I've got a bit quicker since then.
"Stuart knows what I'm about. I'm a direct player, I go for goal and I can put crosses in the box for the strikers.
"I've travelled around a lot in England throughout my football career so I'm just coming up here to enjoy it.
"I want to do well for the team and if we can get back into the Europa League, that will be massive.
"This is a team in the SPL. I had to take this opportunity. You can't let good opportunities pass. If this turns into a permanent deal, I'll be looking for that to happen."