Just FYI, the guides are good but there is a high likelihood that you will still get stuck at some point. I HIGHLY recommend that you leverage the Prysmatic Labs, Lighthouse, and EthStaker discords (or whatever other client you decide to go with, though from what I understand those are the 2 most user friendly to set up). Good luck!
Here's a sneak peek of /r/ethstaker using the [top posts](https://np.reddit.com/r/ethstaker/top/?sort=top&t=year) of the year!
\#1: [A comprehensive look at hardware for staking.](https://np.reddit.com/r/ethstaker/comments/ggmbvd/a_comprehensive_look_at_hardware_for_staking/)
\#2: [8 Things Every Eth2 Validator Should Know Before Staking](https://medium.com/chainsafe-systems/8-things-every-eth2-validator-should-know-before-staking-94df41701487) | [56 comments](https://np.reddit.com/r/ethstaker/comments/gqy2uj/8_things_every_eth2_validator_should_know_before/)
\#3: [Announcing the Ethereum 2 Phase 0 Multiclient Testnet (Medalla) Launch Viewing](https://np.reddit.com/r/ethstaker/comments/i18ju5/announcing_the_ethereum_2_phase_0_multiclient/)
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As someone who is testing staking, this was a REALLY rough launch. Most of the clients weren't ready until hours before launch (and most of them are still not fully functional) and because of that only 55-60% of validators are actually running. It's good that it didn't fail, but it was very rocky.
Luckily the protocol has resilience build in against this scenario. Unluckily, it might take 2 to 3 weeks before offline validators get kicked out. I suppose when real money ^^^^eth is at stake, we will have a higher participation rate.
Because it could be the last chance to test any changes you make in a real massive genesis. Assuming this is the last testnet there's no more chances to test other than simulating something similar which will never be the same as real conditions with thousands of nodes spaced all over the world and random latency, user error etc.
There were lots of bug fixes throughout all of those testnets. As I wrote below, some issues only became apparent once all of the 5 participating clients started p2p networking with each other 48h before genesis. Those 48h are a design constant of the network spec, and I expect this will be made longer for mainnet genesis.