Migrate Certificate to Cloudflare

We have our wildcard (*.example.xyz) certificate in cheap ssl security and we want to migrate it to cloudflare as going forward we want to use cloudflare. In cloudflare we want to go ahead with pro plan. how can we migrate the certificate here?

There is generally no reason to install a Custom certificate in Cloudflare. But you should continue to use your own certificates on your Origin servers, and configure your Cloudflare SSL Mode as Full (Strict). Cloudflare automatically a certificate for all domains which covers *.example.com and example.com.