Everything in moderation, I prefer my fish with the skin on, but it's taste.... Sautéed in Extra Virgin Olive Oil sounds just wonderful.
You may note (fairly quickly) that many members of this forum do not subscribe to the Low Fat notion forced town our throats by the establishment over that last 40 years, we T2's are living proof that it just doesn't work, hence the current pandemic of T2 diabetes; we have had carbs forced on us so long that our bodies have developed Insulin Resistance as a consequence.
One of the pieces of advice many of us give is avoid pre packaged food labels as "Diet", "Diabetic", "Heart Healthy" or any other marketing hype..... These foods are likely to be Low Fat & (to make them palatable) have added carbs (whether blatant or hidden).... All Carbs are bad for us, some worse than others, simple carbs (such as sugar) have a hi glycemic Index (i.e. they peak our blood sugars earlier & higher, other, complex carbs (like those in cabbage) have a low GI, therefore peak is not so high & longer in duration.
Sorry, a lot to take in, but you will probably read this in new posts every few days.
Some of us take our diets to new levels by practicing LCHF (Low Carb High Fat), a good place to start with LCHF is the Paleo Diet, as a gentle introductions to LCHF, though I'd be careful as you are taking gliclazide which works by stimulating the pancreas to dump insulin into the bloodstream in an uncontrolled manner.