The first item is you can only opt in during enrollment period which is generally the 4th quarter to take effect in January. The one exception to that rule is if something significant happens (i forget the legal term). Things such as your insurance through your spouse is lost (due to job loss etc).
There are two insurance plans for non union. A low cost (per month) plan that has a high deductible, and a high cost plan that has low deductibles. Their are pros and cons on each one.
Both plans cover a physical for free.
The low cost plan (high deductible plan) includes your Rx cost as part of your deductible and OOP max (out of pocket). The low cost plan (low deductible) does not. However, Rx is covered immediately (so if you take expensive medicine the high cost plan has no cap on how much you spend for Rx, but the high deductible plan does.
There are so many variables, there is no one right answer for everyone, and you really need to review the options come this 4th quarter.
Personally, I switched two years ago from the high cost (low deductible plan) to the low cost (high deductible plan). I ended up putting the difference in money into a HSA and I pay my dr copays or my RX costs with that HSA credit card. Fortunately that money can only be used for Dentist visits, Eye dr visits\glasses that isn't already covered by insurance. I found that I was able to keep my monthly bill the same, but now I was able to pay for a lot more out of pocket items with before tax dollars. Also, I have money saved in that savings account and it can roll from year to year. (You can even use it in retirement).