As has been said, ask questions.....there's no such thing as a "daft question " .....and again , as has been said, be prepared for all the mundane and dirty jobs initially because we've all been in your position . Hopefully, you'll be allocated a mentor who should guide you as you progress.
Always read the AMM........and also read as many Flight Safety publications as you can.
The big one as it where,
At some point, you are going to make mistakes......so please, always tell somebody. We all make mistakes and the key point is to learn from them. Human Factors are often dismissed by the dinosaurs as being irrelevant. But, there's always causal factors involved when mistakes occur and it's essential these can be openly discussed and analysed.
Also, try and think of your new occupation like this. Crews / pax are dependent on your skills and integrity....so would you be happy to fly in, along with your family. something you've maintained ?
Oh, and you're going to need a sense of humour......trust me, it more than helps.