Need urgent help as I have an Induction week next month for a job

Next month I have a month long induction week where I know I will need to present about 5 times to 40 people. I did this last year for the same company but I feel like I've only got worse since.

I've always gone incredibly red when presenting which makes it a lot worse as I could handle small shakes and a racing heart but when I feel my face go red it makes me so much more nervous. I've always hated when people say they're nervous but don't even look it whereas when I say I'm nervous I looks like a tomato infront of everyone.

Recently when I've been speaking in groups of people (even friends) my lip sometimes starts quivering, I'm not sure why this started but it's horrible. Even just being asked questions in my changing room at cricket i get red because I'm 'on the spot'.

I think I might have bad anxiety because my head always just thinks negatively like I keep thinking about how bad this induction week will go and how my lip will quiver really bad infront of everyone to where I can barely speak. I also think this is the cause of my insomnia as I always think things like this especially when trying to sleep.

It's weird as I like going out with friends and can sometimes be really confident and speak to strangers really well. But then sometimes I'll be really nervous. Like I had to speak to this help desk at university but there were about 10 workers with no other people there and my heart started racing as I imagined them all turning to look at me if I spoke to one of them.

I think my 2 downfalls are being put on the spot (I go red even if it's just 1 person I'm talking to) and then having a group of people looking at me awaiting my answer. How can I fix these problems?

What can I do to stop negative thoughts and be confident when I go to present? I'm going to try get a propranolol prescription.

As a side question. What can I do about anxiety when trying to fall asleep? I've always been awful with sleep and always take about 2 hours to fall asleep. I've been to doctors twice and they just say eat more fruit. I've come to realise I think it's due to anxiety as my mind is constantly racing at night and usually just either recounting bad/awkward experiences from the past or worrying about the future.