You mentioned that you are using Apache, however if you are not bound to it there is a very easy path possible using Caddyserver.
There you only have to define a Caddyfile
with the following content:
example.com
tls {
dns cloudflare
}
Mention the DNS provider you are using in the config and configure the API keys you are via environment variables. Draw from the list of supported providers from the docs.
That's all there is required. The output on the first start will be something like:
Activating privacy features... 2019/10/21 13:36:48 [INFO][cache:0xc0001c8190] Started certificate maintenance routine
[INFO][cache:0xc000092730] Started certificate maintenance routine
2019/10/21 13:24:49 [INFO][example.com] Obtain certificate
2019/10/21 13:24:49 [INFO] [example.com] acme: Obtaining bundled SAN certificate
2019/10/21 13:24:50 [INFO] [example.com] AuthURL: https://acme-v02.api.letsencrypt.org/acme/authz-v3/876706285
2019/10/21 13:24:50 [INFO] [example.com] acme: Could not find solver for: tls-alpn-01
2019/10/21 13:24:50 [INFO] [example.com] acme: Could not find solver for: http-01
2019/10/21 13:24:50 [INFO] [example.com] acme: use dns-01 solver
2019/10/21 13:24:50 [INFO] [example.com] acme: Preparing to solve DNS-01
2019/10/21 13:24:50 [INFO] cloudflare: new record for example.com, ID XXX
2019/10/21 13:24:50 [INFO] [example.com] acme: Trying to solve DNS-01
2019/10/21 13:24:50 [INFO] [example.com] acme: Checking DNS record propagation using [127.0.0.11:53]
2019/10/21 13:24:50 [INFO] Wait for propagation [timeout: 2m0s, interval: 2s]
2019/10/21 13:24:50 [INFO] [example.com] acme: Waiting for DNS record propagation.
2019/10/21 13:24:52 [INFO] [example.com] acme: Waiting for DNS record propagation.
2019/10/21 13:24:55 [INFO] [example.com] The server validated our request
2019/10/21 13:24:55 [INFO] [example.com] acme: Cleaning DNS-01 challenge
2019/10/21 13:24:55 [INFO] [example.com] acme: Validations succeeded; requesting certificates
2019/10/21 13:24:56 [INFO] [example.com] Server responded with a certificate.
done.
Serving HTTPS on port 443
https://example.com
2019/10/21 13:36:48 [INFO] Serving https://example.com
Serving HTTP on port 80
http://example.com
2019/10/21 13:36:48 [INFO] Serving http://example.com