Remember, that every single fighter that you have ever seen, heard of or admired... every fighter that has ever existed, has had their 'first day' in the gym. And no doubt, they'll have all been as nervous/excited/scared as you are right now.
The first time doing ANYTHING new... feels unnatural. Rugby, football, playing the guitar, driving, dancing - anything that involves new skills. The body and mind takes time to develop 'muscle memory' - where you can without thought, go through different movements without having to even think about it. After a while, with lots of practice, these motions become second nature and it takes more effort to deliberately do it 'wrong' than to do it right.
Understand, that you are at the start of a long journey, but every journey starts with a single step. Guys who climb Everest had to make a single step to get up there. Keep that in mind when you're thinking how far you have to go and always keep your eyes on the top of the mountain.
That covers a little on mental attitude - as far as the the rest goes it's as simple as this...
1, Keep your chin down and your hands up.
2, Listen to your trainer and do everything he says.
3, Practice the different movements and punches over and over and over.
4, Have respect for the sport, your trainer and the other fighters
5, Train hard - every session.
That's it - good luck, make yourself proud.
Knowledge is knowing that tomato is a fruit. Wisdom is not putting them in a fruit salad
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