You cannot upload 300 fonts to a website (it will crash your load speed). Instead, use to call only the specific 2-3 Telugu fonts you need for the site.
The gold standard for web and modern app compatibility. Popular choices include (handwriting style), Ramabhadra Lohit Telugu Silicon Andhra: 300- Telugu Font - Free Download
Websites like Telugu Fonts Net (Proceed with caution, use an ad-blocker) often maintain archives of 500+ fonts. The key is to sort their library by "Downloads" and only pick those from the last 5 years. You cannot upload 300 fonts to a website
When searching for "300- Telugu Font - Free Download," look for collections explicitly marked "Unicode compliant" or "OpenType." 300- Telugu Font - Free Download
If your download contains the following 10 fonts, you have struck gold. Here is what to look for: