I would suggest that you first evaluate your desire to pursue a commercial enterprise. For this you need to evaluate the potential for revenue to see if it is worth engaging in obtaining a patent. The potential of a product will depend on the particular market that you want to introduce your product to. The geographical region where your product will most likely sell will be the one that you should consider as a candidate for obtaining a patent (also consider a trademark). Most people usually consider submitting in what is known as the patent triangle (US, Japan, EU) but this will depend on whether that is one of the target markets for your product.
A few ideas on the importance of the patent, can be found at [1]. For someone that makes a significant research investment (such as years of laboratory time and investment) the limited time exclusivity is a chance to get back the investment plus some profit for the effort.
Once the economic potential is determined by geographic region is establish then I would suggest you get a patent attorney that is from that region. If you are filing on multiple countries I would suggest that a patent attorney from your region manage and coordinate the effort in multiple countries.
Yes, definitely talk to a local patent attorney in the first instance. They will advise you on procedures, warn you about premature disclosure of your invention, and give you an idea of costs.
I attach some notes that I use to advise on patent foreign filings. Yes, it does become expensive, but worth it if you wish to commercialize your idea.