Hi, few things, you will make same money no matter the stock is cheap or not, if you are trading with fix risk, there will be no difference, just you will buy / sell different number of shares, more shares for AI and less for Tesla. The price of the stock doesn't define the profitability. 1$ on a 30$ stock and 1$ on a pricey stock mathematically don't have the same value. But 1R profit on the same two stocks has it.
Experienced traders focus on stocks in play, those liquid and in play for the day as they provide the best opportunities with clean price action and fast moves because many traders are trading the stock. Look at RVOL, shares traded for the day, ATR and how clean is the price action.
My advice is to collect data and figure out which stocks you trade well. What I mean by this is that we are different, and everyone has different personality, some trade well stocks which move slower, and others prefer stocks which move faster. Some stocks are more volatile or wicky and every stock has its own personality too. That information will come from your stats over series of trades. However, it doesn't mean you have to avoid all other stocks, it just means that you have a little more edge with some group of stocks than others. I will give you an example, my stats show that I trade well stocks over 20$+, ATR 1$+ and over 2 mln shares traded today. How does this help me. If I am in discord call out chat or look at the scanners, first thing when someone calls a stock, I will look at the ATR, RVOL and shares traded. Then will look in the price action and how clean it is before ever decided to take a trade. This is subjective and I use it for stocks I never traded. I still will trade stocks under 20$ like $CCL or $NIO on certain days when they move clean. The more you trade the more you get experience and understanding of what works for you and what to avoid. There are these traders who trade only few stocks like $SPY. $QQQ or $AAPL and $TSLA. They have spent time to get to know the stocks and how they move, and this gives them a little edge. But they still trade a profitable strategy and have sound execution to make money.
On a different note, learn and test a profitable strategy. This is where the focus must be and forget for the money you will make. Even when you trade live, your main focus is to execute the strategy well and not the money. The money is a by-product of the strategy, your execution and discipline not the price of the stock. Setting daily target of how much money you have to make is something which will delay your development as a trader. It is unrealistic to expect to reach a daily profit goal when you are learning. You may be green for the day but traded horribly and you will take this as a great performance when you just got lucky. Your daily goals must be performance based - discipline, patience, execution, selection etc. Did you execute according to your rules. Was your selection good? Did your trade meet the strategy criteria.
Trading is just the opposite of what everyone thinks. They focus on the money (outcome), but trading is about focusing on the process of trading (performance) and money follows. You start with a strategy, when you master it, you work on your entries, then you work on holding to target and this is how money flow in your account if you consistently execute your strategy. This takes years, set the right expectations from the start, it doesn't come in a month or even an year or two.