Is there any alternative to digital ocean
Yes. There are few like Vultr, Kamatera, Hostinger, DreamHost, InMotion Hosting etc. But the most affordable cloud host is Vultr. It offers 8 cloud plans on a monthly and hourly basis.
can you guide me how to use vultr
The best alternatives to Digital Ocean are VmWare and Virtual Box.
However, if you are looking for similar platforms there are many!
Please visit this link for more information and a wider idea (based on cost as well).
And since you wanted to know about Vultr, you can visit this page for a better idea about it.
Here are a few additional sources to help you with Vultr:
Hope this helps!
you can use cloudways.com to acces digital ocean without credit or debit card