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There are visas for RNs, you must still hold the certification, apply for a visa, your credentials will be verified to confirm they meet the required specifications and then you’ll have to pass a an exam to confirm you possess the required knowledge to work as an RN. You may be required to speak French depending on where you work because this is a bilingual country.
As for a Cisco certificate? That won’t work, you would require a degree in medicine, law or a similarly in-demand field.
You can’t purchase a house unless you have a permanent resident card or are a citizen.