Celtic new boy Joe Ledley says he was convinced to join the club from the moment he walked through the front door at Parkhead.[LNB] The Welshman, who departed Cardiff for the Hoops last month, has committed the next four years to the Parkhead outfit. [LNB]After visiting the club ahead of his transfer, 23-year-old Ledley says there was no doubt in his mind that Celtic was the only place he wanted to play. [LNB]"There were a couple of English teams interested in me at the end of last season. But when I went to talk to Celtic I fell in love with the stadium right away," Ledley told the Daily Record. [LNB]"The first moment I went inside the front door I thought, 'This is the club for me.' I'm still young and learning the game and Celtic is the place to do that."[LNB]Ledley is keen to learn from Hoops boss Neil Lennon and his backroom staff, which includes Johan Mjallby and Alan Thompson. [LNB]"They've been brilliant. They're the guys you have to listen to," he added. [LNB]"They have been there and done it for Celtic. They know more about football than I do so I'll take all advice they give."[LNB]Wales international Ledley is hoping to follow the lead of other Welsh heroes who have made an impact at Parkhead, including goalscorers John Hartson and Craig Bellamy. [LNB]"Craig is a great player and John was as well. Hopefully I can follow in their footsteps," he added. [LNB]"It'll help me with the Welsh national side if I'm playing every week with Celtic. I can improve my football in Scotland.[LNB]"When I spoke to the manager before I signed he said his philosophy was to play football and attack. But I've been here long enough to know there are great players and a high level of ambition in the squad."