Free will Hello, new here as well.
I think Free Will exists. Even when taking Libet's experiments into account, one can argue that a lot of decisions we make in life are not instantaneous. Sometimes they take days, weeks, or even years. For example, if I decide to go to college to improve my chances of employability in the future and make more money, it's a decision that is not instantaneous. It would have formed by quite a bit of information, weighing various options, planning etc. Such decisions do not follow short span that Libet's experiments follow.
Now the question of determinism. At its very elementary level (quantum level) universe seems to be probabilistic. The very building blocks of atoms of our universe are probabilistic in their nature: You can only know either the position of such building block (ie, sub-particles. e.g. Electron, quarks, photon) or their spin (momentum) but never the both at the same time. This behavior is different at classical mechanics level (atoms, molecules, trees, birds, planets, solar system, galaxy, etc). You can know velocity and position at the same moment which allows determinism at their level. Using thought experiments like Laplace's demon, we can conclude that given the ability of knowing velocity and position of every single atom in the universe we can determine how things will turn out to be. The molecules of cosmos already in motion and moving towards a deterministic end though well predictable path of classical mechanics.
How then free will comes into play? Free will becomes relevant at the level of agency of living organisms. Living organisms through their agency disrupt the course of the molecules within the temporal scope of their environment. This agency of living organism is an emergent phenomenon. As we move from very basic level (sub-particle level) of our universe to more granular (atom, molecules), and then further even more complex level (living organisms), certain emergent properties begin to appear that may not directly map to any properties at the previous level but yet have their own reality.
Free will, in my view, is one such phenomenon, or emergent property of reality at our (human, living agent) level. It does not exist at the level where objects of the universe do not have agency but it does exist when an agent comes into picture. So the question of free will exists at a level that determinism does not appear to be a relevant factor since we act in approximation and deterministically as part of the cosmic machine. Our agency does not have full control over the outcomes and hence our efforts (actions) are always approximate. Since we know this nature of approximation of our actions, we are left with trying out variable choices to optimize that approximation for most desirable outcome. This variability in choices gives us free will.