He has also revealed why they must continue working hard and what they warned youngsters to be wary of in Europe.
Westley took charge of both of those games, with new boss Slaven Bilic set to take command from now on, and he says they must continue pushing forward as they aim to change their style for next season.
“Slaven thanked the players because it’s not straightforward,” he told whufc.com.
“It’s been a learning curve and this Europa League is giving the young players an opportunity and something to play for. We need to keep working hard and becoming better with the ball.”
A warning to the youngsters
Bilic’s side elected to name a side full of youngsters for the two legs against the Andorran league runners up, with several impressing on their full debuts.
The likes of Reece Oxford, Josh Cullen, Diego Poyet and Elliot Lee all featured in the two-legged tie, with the latter scoring the deciding goal in the game in Andorra.
The second game in particular proved to be a tricky one, as striker Diafra Sakho was sent off after just 12 minutes, and Westley has revealed that they warned the youngsters before hand about being 'petulant' in Europe.
“We said to the young ones that they really have to learn in Europe that if you are petulant, you can get yourself a yellow card and put yourself under pressure,” he added.