The importance of testing is a tricky one -- It's a very valuable skill to have as a programmer, but I wouldn't consider it a blocker in terms of applying for jobs, or making proposals.
You should be able to verify that a piece of software works as intended, but the value of automated testing only manifests long term. As a freelancer, you won't have those long-term timeframes, and it's up to the client about whether they care enough to pay you to write them. Some will, but many won't.
Most developers are terrible at writing tests when they start out (and some still are well into their career). Keep practicing in your projects, but you'll probably be better off focussing on other areas.
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The importance of testing is a tricky one -- It's a very valuable skill to have as a programmer, but I wouldn't consider it a blocker in terms of applying for jobs, or making proposals.
You should be able to verify that a piece of software works as intended, but the value of automated testing only manifests long term. As a freelancer, you won't have those long-term timeframes, and it's up to the client about whether they care enough to pay you to write them. Some will, but many won't.
Most developers are terrible at writing tests when they start out (and some still are well into their career). Keep practicing in your projects, but you'll probably be better off focussing on other areas.