Be patient. Don't forget that seeing the Gods is a "supernatural" ability. If it was that easy and you could do it in a day or two then everybody would discover it by chance. Of course it takes time and training. It may take months or years. And you don't need to keep opening your 3rd eye, because it only done once. You just need to focus on empowering your chakras after you've opened them. Yes, all of them, because you create imbalance if you only focus on one of them. The 3rd eye isn't as important as you think. It's the front extension of the 6th chakra. The 6th chakra which is in the exact center of your head and is the most important. The reason the site suggests opening the extension of the 6th chakra instead of the 6th chakra itself first is because the 6th chakra itself is very powerful and can overwhelm some people.
The way to do meditations is to do them as a daily habit, much like you brush your teeth. You don't really expect anything extraordinary to happen after brushing your teeth for a day or two or a week. Same with meditation. It's a long term activity much like brushing your teeth. A person doesn't say "I can't find the courage to brush my teeth". Cmon, it's just a simple activity, a simple focusing of your mind you do. It's not done with expectations.
But anyway don't get obsessed too much with trying to see the Gods. It'll come in time if you advance your soul and become more sensitive. If you are not astrally open you'd be better looking for signs, coincidences, insights or random things that come to your mind, because they usually are communication from the Gods.