This question is most often asked by novice investors, so the answer is "yes", Bitcoin can be purchased in very small fractions "Satoshi" which is the smallest unit of Bitcoin, if formulated then the amount is equal to 0.00000001 Bitcoin, so you can buy Bitcoin depending on the amount of money you are ready to invest. Basically, newbie investors need to start investing with small capital, the goal is to be able to learn and adapt to the highly volatile crypto market and you can also manage the risk of loss better.

Instead of investing in other coins, it is better to start buying Bitcoin regularly depending on the amount of money you are ready to invest. The reason I suggest choosing Bitcoin is because since its development in 2009 until now, the Bitcoin network has never been hacked, but cases of Bitcoin theft from Exchanges are common. So, when you already have Bitcoin, always increase its security and avoid storing it in an Exchange wallet.