Hi dearest! Unfortunately as the others have stated one should never force one's chakras. And if one does it will not work, because chakras are opened through peace and harmony and with balance between oneself and the universe. Remember, the Divine and our connection to it is not a variable of time. It doesn't work with our definitions of time. It comes when one is ready for it :D
Some advice to maybe help get you to where you need to be for them to open and start opening? :D Okay well the good news is, practice does indeed make perfect. So practice daily, I read somewhere that once should meditate in the morning and in the evening for twice the amount of minutes as one's age. So practice daily, spend the time you need with it. Devote yourself to reaching a point where you are able to have your chakras open. I mean think about it, what if you force them open, you wouldn't know what to do, because you didn't learn it through trial-and-error.
Yoga is great as well! I know this sounds ridiculous but 20 minute yoga or strecthes even is so good for the body. I have been doing it for 2 weeks now, and I can already see and feel the enhancement in everything I do. Meditation, astral projection, spell working, its all been a little easier lately :D
Another, eating healthy, yea we all hate this one and I personally see McDonalds just a smidge too often, but we find peace in nature, and become one with it as to open our chakras and fully or as fully as possible grasp life. So lets take the expression "You are what you eat" seriously. Eating healthy is a great way to get closer to nature, fresh fruits are gross but you get used to them :)
Try reading up on chakras and try finding opinions of experts and of authors and see what they have to say about it. Often times in order to be one with something, one needs to understand something ;)
Lastly, don't get discouraged. So many people get discouraged because frankly it takes too long and we just couldn't care, but its vital to us. Preserverance! The turtle got their eventually :P
I hoped this helped! Blessings :)