I'm not a miner yet. But can I do it with my laptop? Or is that a bad idea? Because I don't know what the earnings are in a month qua BTC? Maybe stupid questions!🤣
Very very bad idea 
. cpu's are nowhere powerfull enough these days. In the early days of bitcoin it was mined by cpus but then mining with graphics cards came along and after that asics. To give you an example according to http://solochance.com/cpu = very very low megahash range. For instance 1 Mhash gives you a chance of 1 in 3,641,973,524 years which is in the range of the remaining lifetime of our sun
gpu = high megahash range. For instance 300 Mhash gives you a chance of 1 in 12,139,912 years
asic = Terahash range (tera is 1 million times faster then mega). For instance current antminer s19j pro 104 Th device gives you a chance of 1 in 35 years
Your better off buying a lottery ticket then mining bitcoin with a cpu or gpu.
edit: -ck explains it even better in a stickied post in the mining forum:
Quote
Mining BITCOIN is done exclusively with dedicated BITCOIN mining hardware based on ASICs - https://en.wikipedia.org/wiki/Application-specific_integrated_circuit . You CAN NOT meaningfully mine bitcoin today with CPU, GPU or even FPGAs. Bitcoin difficulty adapts to match the amount of mining done on the network and has reached levels trillions of times too high to mine meaningfully with PCs, laptops, tablets, phones, webpages, javascript, GPUs, and even generalised SHA hardware. You will not find software in this section to help you mine bitcoin in this absurdly inefficient manner in this subforum. It would cost you thousands of dollars in electricity per year to earn only a few cents in bitcoin. Even if you combined all the computers in the world, including all known supercomputer, you would not even approach 0.1% of the bitcoin hashrate today. Any discussion outside of ASIC related mining, except in the interests of academia, will be moved to the altcoin mining section. There isn't any point attempting to mine bitcoin with CPU or GPU even in the interests of learning as it shares almost nothing with how bitcoin is mined with ASICs and will not teach you anything.[/]
104th s19 earns about 0.00000515 x 104 = 0.0005356 btc in a day. 6.25/0.0005356 = 11,669 to 1 shot or about 31.8 years it is a rough estimate and is a bit different than your 35 year estimate.
but in a few days the difficulty will change by over 6% that would make it over 33.8 years
