Alfa GT 2.0 JTS transmission / circuit

Good morning, As the title already reveals, it is about the transmission / circuit of my Bella. 1. If the engine and the transmission are really warm, the return gear cracks sporadic when inserting. In the cold condition this is not the case. What can this be? – Have to change one way or another before the transmission oil on the WE against corresponding Castrol EPX90 – can it be that it gets better? (The first filling is now 100tkm or 10 years inside) 2. If I am strong from the first gear or with I often don’t get it in. I press the lever on the left and pull it in direction 2. It feels like there’s a kind of cone that prevents it from inserting (it doesn’t crack or nothing grinds or the like, I just can’t get any further). If I “get around the cones exactly”, however, it can be inserted problemlessly – without cracking and force. If I drive normally, it’s not a problem to put it in. – (See also 3) 3. The circuit feels a bit tacky. If the gear is inserted you have in every direction about 1cm game. You find the gears all without any problems they can be easily inserted and stay inside but somehow this bothers me. – Have already read some of a switch box / shawl backdrop / switch block / rope pull etc. but that was all for other Alfa models. Is a remote diagnosis possible here or should I drive to the dealer? I didn’t actually have any e Pleasure for troubleshooting to spend money on what I could invest in spare parts that I can install myself… BTW: The clutch I tested the works I hope you had a nice Easter and a pleasant weekend