first you have know that is your profile is in demand or not, in Canada. if is in demand then go for further process by self or You can also process with the help of immigration agents or consultants, but be aware of their experience and success rates. The adviser also helps you in documentation and takes care that you do not forget about any particular work. There are many immigration consultants available but you should see which agent provides transparency in the immigration process. For better process and help, a good consultation should be an advocate or lawyer in Canada.So when you decide to process with the agent, you have to check all their details