To get it out of the way i'm personally currently interested in voting labour but ill try to be fair.
The difference between labour and the tories (aka conservatives) are what they believe in. To get details on their beliefs, google the labour manifesto and the conservative manifesto. Manifestos are documents that tell voters what a party promises to do if they get into government. For example off the top of my head, labour wants to change the universal credit approach to benefits (introduced by the torries), reduce or remove tuition fees, put more money into the nhs, create more council houses etc. I reccomend you search up how the torries will approach these same issues (I can't be asked to search it up right now lol) As someone with a life-long disease that requires constant support from the nhs, I'm more likely to support parties like labour who seem to genuinely support the nhs as a public health service. I feel like the conservatives have mismanaged the nhs and try to privatise the nhs too much, although maybe you or other people will feel differently. This nhs issue is one of the reasons I'm unlikely to vote for them.
This is just my opinion. I recommend reading up on the different polices between the different parties and see which one suits your views the most.