Speakers - Audio Interface needed


New member
I have trouble writing posts so please ask me to clarify. I have tried to attach pictures and links to help explain what I need help with. Please ask me for further information. I am unable to attend a local music shop for answers and have hit a brick wall.

Speakers: Mackie MR 524 https://mackie.com/products/mr-series-studio-monitors
They have Line Input XLR, Jack and RCA (Unbalanced)

Speaker 2: Mackie HR824 Mk 1

I need to connect to my laptop and android 11 device for music listening.
I would like to use software such as Sony Sound Forge and vst plug ins.
I would be using the HR824 for my pioneer cdjs

I have these cables:

Microphone Cable
Stagg Y Cable
RCA Cables x 2

I have seen https://www.thomann.de/gb/behringer_umc404hd.htm
Behringer UMC404HD

Is this what I need to be able to plug both speakers in? How would I do this or are there any other suggestions of how I could plug all this together?
Having done some more reading. Im still confused.

Speakers: Mackie MR524 - Input XLR Jack and Phono
Speakers: Mackie HR824 MK Rear Ported Hi Res.

Im thinking of using the MR524 for Laptop and Audio Editing as they are more flat response.
Would this work - https://www.ebay.co.uk/itm/294225540009?ssPageName=STRK:MEBIDX:IT&_trksid=p2060353.m1438.l2649

Or How could I get this to work which is what ive got:

Stagg Professional Cable 1 Metre Stereo Mini 3.5mm Jack to Twin Male XLR Lead - Into Laptop 3.5mm
Stagg Cable Male XLR to Female XLR Microphone Mic Lead 3M Balanced Mono SMC3
RCA Male to Male - N.I Z1 Control - Set as Midi Device 24 bit Audio Does RCA to Jack not work better?

HR824 -
CDJ 1000 RCA DJ Mixer - Speakers
With Jack Ins Outs or XRL

Would this work - https://www.ebay.co.uk/itm/294225540009?ssPageName=STRK:MEBIDX:IT&_trksid=p2060353.m1438.l2649 for 4?
Im not looking for the software side of mixing. Ive not mixed for over 8 years but Im old school set up and not into all this DAC Laptop Stuff.
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i like the scoreboard. Could you share it and write where is it installed with the CG File Explorer? I would like to have it by default for friendly matches and custom tournaments. How could I do it?
Im just curious -- how long does this workout take? Im struggling with fitting in the things I need to fit in, but I know, its all in priorities.