Liam Lindsay’s short career has been a mixture of ups and downs so far but he wouldn’t have it any other way.A new Partick Thistle contract until 2019 is the maturing defender’s reward as he continues to learn his trade in Scottish football’s top flight.At the age of 21, Lindsay has progressed through the club’s youth system via loan spells at Alloa and Airdrie to take his place at the heart of Thistle’s backline.Alan Archibald has been a constant presence throughout Lindsay’s rise and it’s clear the manager continues to be a vital source of support. “The nights aren’t good after a couple of mistakes but the gaffer knows you are going to make mistakes as he was a centre half all his days and had a good career – he knows.” Lindsay told STV.“He talks to me and it’s good to have him there giving me pointers and not putting pressure on me and letting me play my game.”That freedom has allowed Lindsay to become one of Scotland’s most promising young central defenders. An under 21 call up remains a target but has yet to materialise. Before then Archibald sees a few areas to work on.He added: “He has to speak more. He’s a quiet lad and he made some glaring errors last year but other than that I thought he was consistently one of our best defenders. It’s how he recovered from the errors. “Last year we thought he let them affect him for spells in the game. This year he made one at Aberdeen and he got back in the game so I think he’s learning from those mistakes.”In recent games Thistle have moved to a 3-5-2 system, with the Jags gaining their first victory since August with a 2-0 triumph over Dundee.Lindsay feels comfortable with the switch as he continues to make his way in the top flight.“The gaffer has trust in me. Him and Scotty [Paterson] know what it is like to come through as a youngster. “They give me faith and confidence.”On a journey full of twists and turns, those qualities can’t be underestimated. The boss said: “I was lucky enough to coach Liam as a kid in the youth team and up through the reserves as well. He’s a pleasure to work with and he always wants to learn.“He’s playing every week in the Premiership and I think this is a good place for him to be and I think if he keeps listening and learning then he’ll have a bright future.”After a few sporadic first team appearances, the youngster made his breakthrough last season and helped keep two clean sheets in Thistle’s opening three matches.While his overall performances impressed many onlookers including his boss, two red cards showed there was still much to learn in terms of decision making and positioning.