As a new investor it is not that easy to invest in Bitcoin first because you cannot choose which coin will be good for you to invest or which coin will be safe for your money at the beginning.
While it is difficult for everyone to invest in Bitcoin in the beginning, it was easy for me because I didn't learn about crypto currency first but I learned about Bitcoin first. Ever since I first came to know about Bitcoin, I have had a distinct fascination with Bitcoin, and the thought of when I can invest in Bitcoin has always been on my mind. At that time I developed a strong desire to know something about Bitcoin and I tried to find out. Choosing Bitcoin for initial investment was not a difficult task for me as I tried to learn enough about Bitcoin
It was not difficult for me investing in Bitcoin or choosing Bitcoin as a favourite option, and I don't understand what you mean by difficulty in the case of investing in Bitcoin. I am not denying that people presume that Bitcoin is too expensive and have already gotten a huge marketcap, the reason they go for low cap tokens to be able to make huge profits within a short time. I faced a situation like that, and even attended some seminars where the presenter spoke so well in favour of low cap coins and how they can generate huge profits within a short time.
What saved me was that scam was very common with those tokens and low cap coins they promote and I hated being scammed to much so it was easier for me to decide for Bitcoin early enough without having to go through the stress of experimental investing. Invest in these numerous coins is actually experimental because it is trial by error, you never can tell if it is a scam you are buying or not.
I know a lot of people are focusing more on Bitcoin now; various comments here support this assertion.