I recently purchased 0.0045 Bitcoins which is still present in my trust wallet I believe with me owning a fraction of the worlds Bitcoin although a very tiny fraction in practical I am now a crypto currency investor in essence a Bitcoin investor
A good start, but this is probably not the end goal for your investment, try to multiply your bitcoins, because so far your investment seems too small to create a new topic for this. But once you have done that, you are now obligated to achieve good results in investing. 
And also think about safe storage, since a trust wallet is not the most reliable option out there. While the amount of investment is insignificant, this is not critical, but in the future, this must be thought about.That amount may not be a significant amount, but it is money and we also know that making money is extremely difficult these days. It may be small at today's prices, but 10 years from now, it won't be small if bitcoin is worth $1 million or more. I think OP should switch to another wallet is necessary and should be done immediately. Electrum is also a free wallet and doesn't cost anything to get it, so he shouldn't hesitate to just think it's a small amount.