welcome aboard rwm.
why cant you get protein into you diet? if i remember correctly, whey at 80% concentrate has still only about 60% bioavailability so if you took 100g worth of whey a day, only about 60g would be used. (dont ask me the science on it I just know).
whey is not a good source by any means to get protein into the diet, it simply is there for time and cost convenience, if you are vegetarian and do not eat meat, there are plenty of other ways to get protein through eggs and errrr thats all i know of lol as im a carnivore.
as with experience, eh, only use it for while im at uni and straight after a gym session, thats it. i myself prefer egg whites in the morning (although a tad expensive) and then eat meat during the day.
if your a hard gainer and eat alot but dont gain weight, it is still to do with what you eat as well as how much you eat.
give us an example of what you eat, how much of it you eat and how regular you eat. it would also be nice if you could, well if you can use, use some scales, weigh out your food for the day and record the weights, then from there we are able to work out how many calories you consume as well as how many grams of protein, carbs and fat you get in a day.
i.e. weigh your carb, protein sources seperately rather than saying, i had 500 g of rice 'and' chicken. would say, i had 250g of rice and 250g chicken.
it is a bit tedious, but then it depends how serious you are about getting bigger.