There is soooo much more to this than just saying I want to risk X% per trade and make $Y dollars.
First, what is your win rate? IE what percent of your trades in your demo account are positive?
Second, what is your risk:reward ratio? IE in any given trade how many pips of risk do you take to earn how many pips of reward. Personally, I like 2:1 so if my risk is r then my reward is 2r.
Third, do you have a strategy that you can consistently execute in real time that will earn you those reward pips?
Let's take your scenario and walk this through.
We'll assume that you want a max risk of 2.5% and not a per-trade risk of 2.5%. Total risk is equal to your per-trade risk multiplied by your total number of trades. To keep this easy we'll assume your trading plan limits you to one open position (you do have a trading plan, right?).
2.5% risk on a $1,000 account = $25.
Let's assume you are day trading with a 10 pip stop loss. This allows you to trade a position size that sets your pip value to $2.50. If you are trading a currency pair such as EUR/USD (since your account is denominated in USD) then you can trade a total of 25,000 units or 2.5 mini lots. (https://www.babypips.com/tools/position-size-calculator)
This means that you need to earn 20 pips of reward next, which would earn you $50.
To hit a daily average of $50 over the course of a month, you would need to make $1,000 per month (assuming 20 trading days per month) - that is where the 100% return comes from. To earn that in our example at 100% win rate, you would need to take 20 trades or 1 trade per day. However, you will not have a 100% win rate - no trader in the world does.
Let's assume your win rate is 40%. So with 1 trade per day, over the course of the month, you might see the following:
Total Wins: 8 @ $50 per win
Total Losses: 12 @ $25 per loss
Gross Profit: $400
Gross Loss: $300
Net Monthly Profit: $100 (10% return)
So now we need to get you to a net monthly profit of $1,000. We can do that in one of two ways.
First, increase your account size to $10,000. This will add an extra zero onto all the numbers, and give you an average of $50 per day net monthly profit.
Second, increase your risk. This allows you to make bigger trades by increasing your position size. This is not something I recommend. Following is what the numbers look like with 10% total risk based on a $1,000 account.
Total Wins: 8 @ $200 per win
Total Losses: 12 @ $100 per loss
Gross Profit: $1,600
Gross Loss: $1,200
Net Monthly Profit: $400 (40% return)
Since we can see a larger risk in this example leads to a higher return rate, you might think that increased risk isn't all that bad. That is because in our example we are using a very small sample size. However, if you have tested you strategy, then you will know how many max losing trades in a row your strategy is expected to produce.
Some strategies produce 20-30 losing trades in a row. If you took 10% account risk, and lost 10 trades in a row, you would blow your account and have to quit or put more money in.
Short answer: to earn more money, increase your account size. Assuming you have a consistent strategy that has been tested and found to have a positive expectancy in either win rate (over 50%) or via risk reward (40% win rate requires 2:1 risk to reward ratio to be profitable, higher ratios need lower win rates) then increasing your account size might increase your net monthly profit.
Based on your posts, you cannot yet attain this level. Learn more, demo trade for a while, and adjust your expectations accordingly.