https://www.oracle.com/cloud/free/#always-free
Or four ARM VMs. Nice. They didn't have those when I signed up.
1. You know how to create alerts on spending (bugdets)
2. You know exactly what VMs are included in the free tier.
3. You know about networking, VPC, DHCP, IP - Ephemeral vs Reserved
Otherwise a simple mistake may cost you $$$.
After the 30 day trial expires your account is switched to the "always free" mode. It does not allow creating any paid resources which are not marked as "always free".
"...After I upgrade my account, can I downgrade?
There is no option to downgrade your account"
Here is how you can get the answer to this question yourself:
$ dig <website-domain>
you'll get its IP(v4) address. $ whois <IPv4>
you'll see to whom this IP is registred via RIPE.In this case, you can find that the AS it belongs to is also a host provider. They sell KVM hosts for $15.95 / month.
I get that people are apprehensive of using anything from Oracle but so far I haven't had any issues.
Aren't the reported issues with Oracle that they charge you retrospectively? You wouldn't know if you have issues yet!
I had a $15/yr VPS with BuyVM.net for many years and would absolutely recommend them at this price point, except that they have shut down this offering and switched to KVM (it's for the best). Ramnode.com are honest enough and still offer the "192MB SVZ" plan for $15/yr.
I would rather scrape by on the GCS/AWS/Heroku free tier, Netlify / GH pages, ...rather than going back to OpenVZ. Better to pay just a few dollars more for a proper KVM VPS.
If you're looking for such deals cyber monday / black friday is when you will often find such deals.