But unfortunately, this season Liverpool will only play in the Europa League because Liverpool failed to finish in the top four last season. But even so, it certainly doesn't matter, because the Europa League is also still a big competition that will also be targeted for Liverpool to win the title there.
Don't play in Champions League will be less pressure for Liverpool but Europa League will be more easily and less pressure with them but definitely it won't be pressure-free. I am sure Liverpool will want to go as far as possible in Europa League and if they see opportunity to win it, they will do their best. It will require them to actually focus on Europa League if they go deep in knock out phase and it will impact their play resource, fitness and concentration for Premier League.
Also about Liverpool next match in the Premier League against Aston Villa, I still think that Aston Villa is also not a weak team.
Aston Villa were strong in the last season and in this season, they only have 1 point less than Liverpool after three matches.
They are in top of the table and will have to beat each other to maintain their position. With Liverpool, they will want three points to race with Manchester City as they don't have a humble target like top four.