Hey bro, leveling up a reddit account is like growing a plant, it needs patience and care from the start, first, warm up your account slowly, for the first few days, just browse the subreddits that interest you, like posts, and save them, don't comment yet, let Reddit see that you're a real user and not a bot.
After several days, start commenting in large, friendly subreddits, look for recent posts and be one of the first to reply, your comments should be helpful or insightful no empty phrases, comment a couple of times a day for a while before you feel comfortable creating your own post, the final trick is to specialize in subreddits within your niche, the karma you earn elsewhere won't help if you later want to comment in specific communities, every community values your participation from within, so focus on where you really want to be and build your reputation there.