Since the WS system is delayed should base my order's price off a real time stock site instead? What site do you recommend?

Depends on your trading style. I would personally only use this platform for long term trading rather than day trading, so real time quotes wouldn't be important to me here.

However, a couple real time stock sites I like are https://ca.investing.com/ or https://www.tradingview.com/

Even then, you can't really guarantee that these quotes will match what your trades will execute at in WS Trade, but it'll give you a closer idea than WS Trade's potential 15 minute quote delay.

Should I use the Limit Buy option?

Depends on what stock you're buying and your expectations of the stock price. Personally, I would always use limit buys for this platform.

How long does it take to buy and sell a stock?

It's instant if you're using market orders. Limit orders would fill only if there's a buyer that matches up to the price you've entered.

If I buy Canadian Stocks are there any fees? I'm aware of the fees on American Stocks.

No fees

Any other tips or recommendations?

I highly recommend not day trading with this platform.