Improve Mac performance

you are seeing the APFS crypto-locked system Volume as a separate Volume. that all looks completely ordinary and is no cause for alarm. You can't put them back together, it a feature of modern MacOS.

<< I've heard that I should clear our my storage to improve the power. >>

Good thing you stopped by here before doing anything rash. That advice is completely outdated nonsense.

By far the easiest way to cause poor performance, instability, overheating and crashing is to install ANY third-party speeder-uppers, Cleaners, Optimizers, or Virus scanners. or a VPN that you installed yourself. The main reason is that they are relentless in scanning your files, non-stop, looking for virus-like patterns in Everything. When completed, they do it all again.

¿are you running any of those?

Some services I'm using require a lot of power and it restart the webpages out of nowhere

If you want a data-driven evaluation in this setting where we can neither see nor touch your computer, please post an EtreCheck report. We can quickly and within the limitations of these forums help you determine what issues are at play without our playing a protracted game of "20 Questions" with you that could go on for days. 

EtreCheck Pro is available here:

https://etrecheck.com/index

The free version will do nicely for this purpose, although the app is worthy of our financial support.

We can see hard data about drive performance, software issues and interferences, and RAM usage. Etrecheck is the development of a long-serving and trusted ASC contributor. It is a reporting app, not a "fix-it” app, expressly for displaying information in these forums to help us help you remotely. It will not reveal any personal or secure information.

Please see this excellent user tip on how to post long text reports like EtreCheck's into a forum response:

How to use the Add Text Feature When Post… - Apple Community

Here are a few thoughts -

1. Your storage is 250GB shared by the three volumes Macintosh HD, Macintosh HD-Data & Update. The operating system takes care of how the disk space is shared among them.
2. Your 2017 MBP is the oldest of the MBP models that are compatible with Ventura. I'd say that's probably one of the reasons Ventura isn't a great performer on it.
3. Hard to tell what you might do to improve performance. How about if you download & run Etrecheck and post a copy of the report here. It will provide info about your system that may point to some areas for improvement
4. 100GB is good enough for 'optimal performance' on your MBP. But it wouldn't hurt to move whatever data you can to an external drive.