Free DigitalOcean trial is available! Your options are pretty much:
1. Use the referral link here; for first month of $10 droplet for free or two months of $5 droplet for free.
2. Trial 3-days free DigitalOcean on Cloudways here; it's one of the easiest ways to quickly deploy a fully managed server (optionally with a ready installed WordPress) in a matter of minutes.
Option 1. You need to enter credit card details.
Option 2. Just register an account; no credit card details needed.
Hope this help!