Is it possible to really learn azure or aws on your own without spending much money?

My company doesn't intend to go for cloud solutions but I feel that's what I want to work on. I'm nervous about accidentally creating a huge bill.

Aws has a free tier that expires after a year on a newly setup account. Not sure about Azure (they confuse me and I accidentally got ran up a bill around 50$ for their function stuff).
Most tutorials will use the free tier or if not it shouldn't be more than a dollar or two

You can set a budget on aws to notify you when you hit a spend limit. That notification can be sent via aws sns. That could be connected to a lambda that clears everything in your account (only set this up on a dev account). "cloud-nuke" is one such tool.

So, yes, in theory it's possible to limit the cost. It's kinda nasty though. There is a logic to not doing this by default, but it makes indy devs wary for exactly this reason.

And yes, various clouds come with free allowances, but they are limited.

The solution I've described is a brute force hammer. You could set up something more elegant, but that gets you started.

Definitely yes with free tiers but remember that one of the interests of cloud computing is to manage a large amount of operations for a cheap price,

Typically, you can make a DynamoDB table that is (mostly) free for your usage but that would be far from being optimized on a large amount of data

Yes, study for your AWS Cloud Practitioner exam. It’s easy, gives you skills you need, and some online classes even give you free lab space to explore in. Even if you run it yourself, the Cloud Practitioner exam work won’t cost you much to run in your own account… if you’re careful. Keep eyes on your bill every day to make sure you didn’t do something stupid. If you do, send an AWS Support ticket and humbly beg for mercy , they’re sometimes very nice the first or second time, especially if you identify as a student and not a business.

I've been learning AWS on the free tier. There are some service that have no free tier but I've been able to practice just fine for the most part.

Visual Studio Enterprise subscription comes with 130$ credit to spend in Azure every month, without having to give payment info for Azure. So if you already use VS anyway and overlooked that, that's the safest / easiest / cheapest option.