Want to purse diploma but have no work experience and large study gap. Please help.

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I completed my high school in 2015, was pursuing a degree course but due to health reasons had to drop out.
Did some certifications in 2019 and 2020, but still am unemployed.
Now want to pursue diploma in Canada. What should I do?

How do I justify the large study gap and no work experience?

If anyone has similar experience, please guide!

Please and thankyou