If you’re starting in tech right now, and can go back to live with parents after graduation, then do that while building up your presence. Just don’t take your foot off the gas until you have that solid network. The stigma about moving back home doesn’t make sense to me, unless all you do is play WOW (or whatever people are wasting time on these days).
If that doesn’t work, find some roommates. Be willing to slum it a bit while establishing yourself. It might not be glamorous like Instagram or Tiktok says it should be, but the flexibility you have while keeping costs down opens more opportunities. You can take more risks if you don’t have to worry so much about making rent or paying bills.
More like 10+. That is the network sweet spot. At 20+ your network is starting to gray out and mostly useless unless you have someone who has risen up to VP ranks who can influence some downstream director to move your resume to the top. At 30+ you are some younger person’s “network”. At 40 years (where I currently am) your “network” is frankly retired, dead, or just trying to squeeze out those last few years in a no stress role to keep their medical insurance and can be no help to you.