Considering getting a second dog (Clearfield)

Would love some opinions on if having a second dog is wayyyy harder that having one or just a little harder? We have a two month old puppy and we’ve been debating on getting a second dog for them to play together.
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is it a bad idea? We have an extra large breed dog.
So we’d want to get at least a large size dog.
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just looking for opinions and maybe some options.
Thanks!